11institutetext:  MTA-ELTE Exoplanet Research Group, 9700 Szombathely, Szent
Imre h. u. 112, Hungary, 11email<EMAIL_ADDRESS>22institutetext:  ELTE
Gothard Astrophysical Observatory, 9700 Szombathely, Szent Imre h. u. 112,
Hungary 33institutetext:  Astronomical Institute, Slovak Academy of Sciences,
05960 Tatranská Lomnica, Slovakia 44institutetext:  Physikalisches Institut,
University of Bern, Gesellsschaftstrasse 6, 3012 Bern, Switzerland
55institutetext:  Department of Physics and Kavli Institute for Astrophysics
and Space Research, Massachusetts Institute of Technology, Cambridge, MA
02139, USA 66institutetext:  Dipartimento di Fisica, Universita degli Studi di
Torino, via Pietro Giuria 1, I-10125, Torino, Italy 77institutetext:
Department of Astronomy, Stockholm University, AlbaNova University Center,
10691 Stockholm, Sweden 88institutetext:  Instituto de Astrofisica e Ciencias
do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto,
Portugal 99institutetext:  Astrophysics Group, Cavendish Laboratory,
University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, UK
1010institutetext:  Astrobiology Research Unit, Université de Liège, Allée du
6 Août 19C, B-4000 Liège, Belgium 1111institutetext:  Space Research
Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, A-8042 Graz,
Austria 1212institutetext:  Observatoire Astronomique de l’Université de
Genève, Chemin Pegasi 51, Versoix, Switzerland 1313institutetext:  Centre for
Exoplanet Science, SUPA School of Physics and Astronomy, University of St
Andrews, North Haugh, St Andrews KY16 9SS, UK 1414institutetext:  Space
Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, 8042
Graz, Austria 1515institutetext:  INAF, Osservatorio Astronomico di Padova,
Vicolo dell’Osservatorio 5, 35122 Padova, Italy 1616institutetext:  Department
of Astrophysics, University of Vienna, Tuerkenschanzstrasse 17, 1180 Vienna,
Austria 1717institutetext:  Institute of Planetary Research, German Aerospace
Center (DLR), Rutherfordstrasse 2, 12489 Berlin, Germany 1818institutetext:
European Space Agency (ESA), European Space Research and Technology Centre
(ESTEC), Keplerlaan 1, 2201 AZ Noordwijk, The Netherlands 1919institutetext:
Instituto de Astrofisica de Canarias, 38200 La Laguna, Tenerife, Spain
2020institutetext:  Institut d’Estudis Espacials de Catalunya (IEEC), 08034
Barcelona, Spain 2121institutetext:  Depto. de Astrofisica, Centro de
Astrobiologia (CSIC-INTA), ESAC campus, 28692 Villanueva de la Cañada
(Madrid), Spain 2222institutetext:  Université Grenoble Alpes, CNRS, IPAG,
38000 Grenoble, France 2323institutetext:  Université de Paris, Institut de
physique du globe de Paris, CNRS, F-75005 Paris, France 2424institutetext:
Departamento de Fisica e Astronomia, Faculdade de Ciencias, Universidade do
Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal 2525institutetext:
Center for Space and Habitability, University of Bern, Gesellschaftsstrasse 6,
3012, Bern, Switzerland 2626institutetext:  Leiden Observatory, University of
Leiden, PO Box 9513, 2300 RA Leiden, The Netherlands 2727institutetext:
Department of Space, Earth and Environment, Chalmers University of Technology,
Onsala Space Observatory, 43992 Onsala, Sweden 2828institutetext:  Space
sciences, Technologies and Astrophysics Research (STAR) Institute, Université
de Liège, 19C Allée du 6 Août, B-4000 Liège, Belgium 2929institutetext:
Departamento de Astrofisica, Universidad de La Laguna, 38206 La Laguna,
Tenerife, Spain 3030institutetext:  Institut de Ciencies de l’Espai (ICE,
CSIC), Campus UAB, Can Magrans s/n, 08193 Bellaterra, Spain 3131institutetext:
Aix Marseille Univ, CNRS, CNES, LAM, 38 rue Frédéric Joliot-Curie, 13388
Marseille, France 3232institutetext:  IMCCE, UMR8028 CNRS, Observatoire de
Paris, PSL Univ., Sorbonne Univ., 77 av. Denfert-Rochereau, 75014 Paris,
France 3333institutetext:  Max Planck Institute for Extraterrestrial Physics,
Giessenbachstrasse 1, 85748 Garching bei München, Germany 3434institutetext:
Dipartimento di Fisica e Astronomia ”Galileo Galilei”, Universita degli Studi
di Padova, Vicolo dell’Osservatorio 3, 35122 Padova, Italy 3535institutetext:
INAF, Osservatorio Astrofisico di Catania, Via S. Sofia 78, 95123 Catania,
Italy 3636institutetext:  Astrophysics Group, Keele University, Staffordshire,
ST5 5BG, United Kingdom 3737institutetext:  Admatis, 5. Kandó Kálmán Street,
3534 Miskolc, Hungary 3838institutetext:  Konkoly Observatory, Research Centre
for Astronomy and Earth Sciences, 1121 Budapest, Konkoly Thege Miklós út
15-17, Hungary 3939institutetext:  Institut d’astrophysique de Paris, UMR7095
CNRS, Université Pierre & Marie Curie, 98bis blvd. Arago, 75014 Paris, France
4040institutetext:  Centre for Mathematical Sciences, Lund University, Box
118, 22100 Lund, Sweden 4141institutetext:  Department of Physics, University
of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
4242institutetext:  Center for Astronomy and Astrophysics, Technical
University Berlin, Hardenberstrasse 36, 10623 Berlin, Germany
4343institutetext:  Institute of Astronomy, University of Cambridge, Madingley
Road, Cambridge, CB3 0HA, United Kingdom 4444institutetext:  INAF,
Osservatorio Astrofisico di Torino, Via Osservatorio, 20, 10025 Pino Torinese
TO, Italy 4545institutetext:  Department of Space and Climate Physics, Mullard
Space Science Laboratory, Holmbury St Mary RH5 6NT, UK 4646institutetext:
Brorfelde Observatory, Observator Gyldenkernes Vej 7, DK-4340 Tølløse, Denmark

# Refined parameters of the HD 22946 planetary system
and the true orbital period of planet d††thanks: This article uses data from
CHEOPS programmes CH_PR110048 and CH_PR100031. Photometry and radial velocity
data of HD 22946 are available at the CDS via anonymous ftp to
cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-
bin/qcat?J/A+A/.

Z. Garai Refined parameters of the HD 22946 planetary system and the true
orbital period of planet d††thanks: This article uses data from CHEOPS
programmes CH_PR110048 and CH_PR100031. Photometry and radial velocity data of
HD 22946 are available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr
(130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. H. P. Osborn Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. D. Gandolfi Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. A. Brandeker Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. S. G. Sousa Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. M. Lendl Refined parameters of
the HD 22946 planetary system and the true orbital period of planet d††thanks:
This article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. A. Bekkelien Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. C. Broeg Refined parameters of
the HD 22946 planetary system and the true orbital period of planet d††thanks:
This article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. A. Collier Cameron Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. J. A. Egger Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. M. J. Hooton Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. Y. Alibert Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. L. Delrez Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. L. Fossati Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. S. Salmon Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. T. G. Wilson Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. A. Bonfanti Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. A. Tuson Refined parameters of
the HD 22946 planetary system and the true orbital period of planet d††thanks:
This article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. S. Ulmer-Moll Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. L. M. Serrano Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. L. Borsato Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. R. Alonso Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. G. Anglada Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. J. Asquier Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. D. Barrado y Navascues Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. S. C. C. Barros Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. T. Bárczy Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. W. Baumjohann Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. M. Beck Refined parameters of
the HD 22946 planetary system and the true orbital period of planet d††thanks:
This article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. T. Beck Refined parameters of
the HD 22946 planetary system and the true orbital period of planet d††thanks:
This article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. W. Benz Refined parameters of
the HD 22946 planetary system and the true orbital period of planet d††thanks:
This article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. N. Billot Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. F. Biondi Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. X. Bonfils Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. M. Buder Refined parameters of
the HD 22946 planetary system and the true orbital period of planet d††thanks:
This article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. J. Cabrera Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. V. Cessa Refined parameters of
the HD 22946 planetary system and the true orbital period of planet d††thanks:
This article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. S. Charnoz Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. Sz. Csizmadia Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. P. E. Cubillos Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. M. B. Davies Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. M. Deleuil Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. O. D. S. Demangeon Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. B.-O. Demory Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. D. Ehrenreich Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. A. Erikson Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. V. Van Eylen Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. A. Fortier Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. M. Fridlund Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. M. Gillon Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. V. Van Grootel Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. M. Güdel Refined parameters of
the HD 22946 planetary system and the true orbital period of planet d††thanks:
This article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. M. N. Günther Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. S. Hoyer Refined parameters of
the HD 22946 planetary system and the true orbital period of planet d††thanks:
This article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. K. G. Isaak Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. L. L. Kiss Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. M. H. Kristiansen Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. J. Laskar Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. A. Lecavelier des Etangs
Refined parameters of the HD 22946 planetary system and the true orbital
period of planet d††thanks: This article uses data from CHEOPS programmes
CH_PR110048 and CH_PR100031. Photometry and radial velocity data of HD 22946
are available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr
(130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. C. Lovis Refined parameters of
the HD 22946 planetary system and the true orbital period of planet d††thanks:
This article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. A. Luntzer Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. D. Magrin Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. P. F. L. Maxted Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. C. Mordasini Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. V. Nascimbeni Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. G. Olofsson Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. R. Ottensamer Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. I. Pagano Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. E. Pallé Refined parameters of
the HD 22946 planetary system and the true orbital period of planet d††thanks:
This article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. G. Peter Refined parameters of
the HD 22946 planetary system and the true orbital period of planet d††thanks:
This article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. G. Piotto Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. D. Pollacco Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. D. Queloz Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. R. Ragazzoni Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. N. Rando Refined parameters of
the HD 22946 planetary system and the true orbital period of planet d††thanks:
This article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. H. Rauer Refined parameters of
the HD 22946 planetary system and the true orbital period of planet d††thanks:
This article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. I. Ribas Refined parameters of
the HD 22946 planetary system and the true orbital period of planet d††thanks:
This article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. N. C. Santos Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. G. Scandariato Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. D. Ségransan Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. A. E. Simon Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. A. M. S. Smith Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. M. Steller Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. Gy. M. Szabó Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. N. Thomas Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. S. Udry Refined parameters of
the HD 22946 planetary system and the true orbital period of planet d††thanks:
This article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. J. Venturini Refined
parameters of the HD 22946 planetary system and the true orbital period of
planet d††thanks: This article uses data from CHEOPS programmes CH_PR110048
and CH_PR100031. Photometry and radial velocity data of HD 22946 are available
at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/. N. Walton Refined parameters
of the HD 22946 planetary system and the true orbital period of planet
d††thanks: This article uses data from CHEOPS programmes CH_PR110048 and
CH_PR100031. Photometry and radial velocity data of HD 22946 are available at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.Refined parameters of the HD
22946 planetary system and the true orbital period of planet d††thanks: This
article uses data from CHEOPS programmes CH_PR110048 and CH_PR100031.
Photometry and radial velocity data of HD 22946 are available at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/.

(Received September 15, 1996; accepted March 16, 1997)

###### Abstract

Context. Multi-planet systems are important sources of information regarding
the evolution of planets. However, the long-period planets in these systems
often escape detection. These objects in particular may retain more of their
primordial characteristics compared to close-in counterparts because of their
increased distance from the host star. HD 22946 is a bright ($G=8.13$ mag)
late F-type star around which three transiting planets were identified via
Transiting Exoplanet Survey Satellite (TESS) photometry, but the true orbital
period of the outermost planet d was unknown until now.

Aims. We aim to use the Characterising Exoplanet Satellite (CHEOPS) space
telescope to uncover the true orbital period of HD 22946d and to refine the
orbital and planetary properties of the system, especially the radii of the
planets.

Methods. We used the available TESS photometry of HD 22946 and observed
several transits of the planets b, c, and d using CHEOPS. We identified two
transits of planet d in the TESS photometry, calculated the most probable
period aliases based on these data, and then scheduled CHEOPS observations.
The photometric data were supplemented with ESPRESSO (Echelle SPectrograph for
Rocky Exoplanets and Stable Spectroscopic Observations) radial velocity data.
Finally, a combined model was fitted to the entire dataset in order to obtain
final planetary and system parameters.

Results. Based on the combined TESS and CHEOPS observations, we successfully
determined the true orbital period of the planet d to be $47.42489\pm 0.00011$
d, and derived precise radii of the planets in the system, namely $1.362\pm
0.040\leavevmode\nobreak\ \mathrm{R_{\oplus}}$, $2.328\pm
0.039\leavevmode\nobreak\ \mathrm{R_{\oplus}}$, and $2.607\pm
0.060\leavevmode\nobreak\ \mathrm{R_{\oplus}}$ for planets b, c, and d,
respectively. Due to the low number of radial velocities, we were only able to
determine 3$\sigma$ upper limits for these respective planet masses, which are
$13.71\leavevmode\nobreak\ \mathrm{M}_{\oplus}$, $9.72\leavevmode\nobreak\
\mathrm{M}_{\oplus}$, and $26.57\leavevmode\nobreak\ \mathrm{M}_{\oplus}$. We
estimated that another 48 ESPRESSO radial velocities are needed to measure the
predicted masses of all planets in HD 22946. We also derived stellar
parameters for the host star.

Conclusions. Planet c around HD 22946 appears to be a promising target for
future atmospheric characterisation via transmission spectroscopy. We can also
conclude that planet d, as a warm sub-Neptune, is very interesting because
there are only a few similar confirmed exoplanets to date. Such objects are
worth investigating in the near future, for example in terms of their
composition and internal structure.

###### Key Words.:

Methods: observational – Techniques: photometric – Planets and satellites:
fundamental parameters

##  1 Introduction

Multi-planet systems are important from many viewpoints. Not only are they
susceptible of relatively straightforward confirmation as bona fide planets
(Lissauer et al., 2012), they also allow intra-planetary comparisons to be
made for planets which formed under the same conditions; see for example Weiss
et al. (2018). The majority of the known multi-planet systems were found by
space-based exoplanet transit surveys. This is because, while giant hot-
Jupiters are relatively easy to observe with ground-based photometry, the
detection of smaller planets, for example, Earths, super-Earths, and sub-
Neptunes, which are typically found in multi-planet systems, requires the
precise photometry of space-based observatories such as TESS (Ricker, 2014).

Mutual gravitational interactions in some multi-planet systems can provide
constraints on the planet masses through transit time variations (TTVs); see
for example Nesvorný & Morbidelli (2008). Alternatively, radial velocity (RV)
observations are needed to put constraints on the masses of planets (Mayor &
Queloz, 1995). Even where masses cannot be determined, mass upper limits can
provide proof that the studied objects are of planetary origin; see for
example Hord et al. (2022), Wilson et al. (2022), or Stefánsson et al. (2020).
Mass determination can then help constrain the internal structure of the
planet bodies, and break degeneracies in atmospheric characterisation follow-
up studies. If precise planet radii are also determined from transit
photometry, this allows the planet internal density to be calculated and the
planetary composition to be estimated; see for example Delrez et al. (2021)
and Lacedelli et al. (2021, 2022). Precise planetary parameters also allow the
planets to be put in the context of population trends, such as the radius
(Fulton et al., 2017; Van Eylen et al., 2018; Martinez et al., 2019; Ho & Van
Eylen, 2023) and density (Luque & Pallé, 2022) valleys.

Long-period planets in multiple-planet systems often escape detection,
especially when their orbital periods are longer than the typical observing
duration of photometric surveys (e.g. $\sim 27$ d for TESS). However,
detecting such planets is also important. For example, the increased distance
from their host stars means that, when compared with close-in planets, they
may retain more of their primordial characteristics, such as unevaporated
atmospheres (Owen, 2019) or circumplanetary material (Dobos et al., 2021). Due
to the limited observing duration of the TESS primary mission, which observed
the majority of the near-ecliptic sectors for only 27 days, planets on long
periods produce only single transits. However, thanks to its extended mission,
TESS re-observed the same fields two years later, and in many cases was able
to re-detect a second transit; see for example Osborn et al. (2022). These
‘duotransit’ cases require follow-up in order to uncover the true orbital
period due to the gap, which causes a set of aliases,
$P\in(t_{\mathrm{tr,2}}-t_{\mathrm{tr,1}})/(1,2,3,\dots,N_{\mathrm{max}})$,
where $t_{\mathrm{tr,1}}$ and $t_{\mathrm{tr,2}}$ are the first and the second
observed mid-transit times, respectively. The longest possible period is the
temporal distance between the two mid-transit times,
$P_{\mathrm{max}}=(t_{\mathrm{tr,2}}-t_{\mathrm{tr,1}})$, and the shortest
possible period is bounded by the non-detection of subsequent transits.

In addition to ground-based telescopes, the CHEOPS space observatory (Benz et
al., 2021) can be used to follow-up duotransit targets and to determine their
true orbital periods and other characteristics. For example, the periods of
two young sub-Neptunes orbiting BD+40 2790 (TOI-2076, TIC-27491137) were found
using a combination of CHEOPS and ground-based photometric follow-up
observations (Osborn et al., 2022). Furthermore, these combined observations
uncovered the TTVs of two planets, and also improved the radius precision of
all planets in the system. CHEOPS observations also recovered orbital periods
of duotransits in HIP 9618 (Osborn et al., 2023), TOI-5678 (Ulmer-Moll et al.,
2023), and HD 15906 (Tuson et al., 2023) systems. In the present study, we
investigated the HD 22946 system with a similar aim. HD 22946 (TOI-411,
TIC-100990000) is a bright ($G=8.13$ mag) late F-type star with three
transiting planets. The planetary system was discovered and validated only
recently by Cacciapuoti et al. (2022); hereafter C22. The authors presented
several parameters of the system, including the radii and mass limits of the
planets. They found that planet b is a super-Earth with a radius of $1.72\pm
0.10\leavevmode\nobreak\ \mathrm{R}_{\oplus}$, while planets c and d are sub-
Neptunes with radii of $2.74\pm 0.14\leavevmode\nobreak\ \mathrm{R}_{\oplus}$
and $3.23\pm 0.19\leavevmode\nobreak\ \mathrm{R}_{\oplus}$, respectively. The
$3\sigma$ upper mass limits of planets b, c, and d were determined —based on
ESPRESSO spectroscopic observations (see Sect. 2.3)— to be
$11\leavevmode\nobreak\ \mathrm{M}_{\oplus}$, $14.5\leavevmode\nobreak\
\mathrm{M}_{\oplus}$, and $24.5\leavevmode\nobreak\ \mathrm{M}_{\oplus}$,
respectively. As TESS recorded several transits during observations in sector
numbers 3, 4, 30, and 31, the discoverers easily derived the orbital periods
of the two inner planets, b and c, which are about 4.040 d and 9.573 d,
respectively. The orbital period of planet d was not found by C22. The authors
determined its presence through a single transit found in sector number 4 and
obtained its parameters from this single transit event. Its depth and the host
brightness make planet d easily detectable with CHEOPS, and therefore HD 22946
was observed several times with this instrument within the Guaranteed Time
Observations (GTO) programmes CH_PR110048 and CH_PR100031, with the main
scientific goals being to uncover the true orbital period of planet d and to
refine the parameters of the HD 22946 system based on CHEOPS and TESS
observations via joint analysis of the photometric data, supplemented with
ESPRESSO spectroscopic observations of HD 22946.

The present paper is organised as follows. In Sect. 2, we provide a brief
description of observations and data reduction. In Sect. 3, we present the
details of our data analysis and our first results, including stellar
parameters, period aliases of HD 22946d from the TESS data, and a search for
TTVs. Our final results based on the combined TESS, CHEOPS, and RV model are
described and discussed in Sect. 4. We summarise our findings in Sect. 5.

Table 1: Log of TESS photometric observations of HD 22946. Time interval of observation | Sector No. | Transits
---|---|---
HD 22946b
2018-09-20 – 2018-10-18 | 03 | 5
2018-10-18 – 2018-11-15 | 04 | 6
2020-09-22 – 2020-10-21 | 30 | 6
2020-10-21 – 2020-11-19 | 31 | 6
HD 22946c
2018-09-20 – 2018-10-18 | 03 | 2
2018-10-18 – 2018-11-15 | 04 | 2
2020-09-22 – 2020-10-21 | 30 | 2
2020-10-21 – 2020-11-19 | 31 | 2
HD 22946d
2018-10-18 – 2018-11-15 | 04 | 1
2020-09-22 – 2020-10-21 | 30 | 1

##  2 Observations and data reduction

###  2.1 TESS data

HD 22946 was observed during four TESS sectors: numbers 3, 4, 30, and 31 (see
Table 1). The time gap between the two observing seasons is almost two years.
These TESS data were downloaded from the Mikulski Archive for Space
Telescopes111See
https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html. in the form of
Presearch Data Conditioning Simple Aperture Photometry (PDCSAP) flux. These
data, containing 61 987 data points, were obtained from two-minute
integrations and were initially smoothed by the PDCSAP pipeline. This light
curve is subjected to more treatment than the simple aperture photometry (SAP)
light curve, and is specifically intended for detecting planets. The pipeline
attempts to remove systematic artifacts while keeping planetary transits
intact. The average uncertainty of the PDCSAP data points is 310 ppm.

During these TESS observing runs, 23 transits of planet b were recorded, and
the transit of planet c was observed eight times in total (see more details in
Table 1). As in C22, we also initially recognised a transit-like feature in
the sector number 4 data at $t_{\mathrm{tr,1}}=2\leavevmode\nobreak\
458\leavevmode\nobreak\ 425.1657$ $\mathrm{BJD}_{\mathrm{TDB}}$ through visual
inspection of the light curve. Given 65%–80% of single transits from the TESS
primary mission will re-transit in the extended mission sectors (see Cooke et
al., 2019, 2021), we subsequently visually inspected the light curve once the
TESS year 3 data were available and found a second dip at
$t_{\mathrm{tr,2}}=2\leavevmode\nobreak\ 459\leavevmode\nobreak\ 136.5357$
$\mathrm{BJD}_{\mathrm{TDB}}$ in the sector number 30 data with near-identical
depth and duration. Given the high prior probability of finding a second
transit, the close match in transit shape between events, and the high quality
of the data (i.e. minimal systematic noise elsewhere in the light curve), we
concluded that this signal is a bona fide transit event and that the transits
in sector numbers 4 and 30 are very likely caused by the same object, that is,
by planet d.

Outliers were cleaned using a $3\sigma$ clipping, where $\sigma$ is the
standard deviation of the light curve. With this clipping procedure, we
discarded 300 data points out of 61 987, which is $\sim 0.5\%$ of the TESS
data. Subsequently, we visually inspected the dataset in order to check the
effect of the outlier removal, which we found to be reasonable. As TESS uses
as time stamps Barycentric TESS Julian Date (i.e.
$\mathrm{BJD}_{\mathrm{TDB}}-2\leavevmode\nobreak\ 457\leavevmode\nobreak\
000.0$), during the next step we converted all TESS time stamps to
$\mathrm{BJD}_{\mathrm{TDB}}$.

###  2.2 CHEOPS data

HD 22946 was observed five times with the CHEOPS space telescope. This is the
first European space mission dedicated primarily to the study of known
exoplanets. It consists of a telescope with a mirror of 32 cm in diameter
based on a Ritchey-Chrétien design. The photometric detector is a single-CCD
camera covering the wavelength range from 330 to 1100 nm with a field of view
of 0.32 deg2. The payload design and operation have been optimised to achieve
ultra-high photometric stability, achieving a photometric precision of 20 ppm
on observations of a G5-type star in 6 hours, and 85 ppm observations of a
K5-type star in 3 hours (Benz et al., 2021). The CHEOPS observations were
scheduled based on the existing TESS observations of planets b and c, and
mainly based on the observed transit times of planet d (see Sect. 2.1). The
marginal probability for each period alias of planet d was calculated using
the MonoTools package (see Sect. 3.2). We were not able to observe all the
highest-probability aliases, because some were not visible during the two-week
period of visibility. Within the program number CH_PR110048, we therefore
planned to observe the three highest-probability aliases of planet d with
CHEOPS, but due to observability constraints and conflicts with other
observations, only two visits222A visit is a sequence of successive CHEOPS
orbits devoted to observing a given target. of planet d aliases were
scheduled. Its true orbital period was confirmed during the second
observation. The remaining three visits were scheduled in the framework of the
program number CH_PR100031. Based on these CHEOPS observations, three transits
of planet b were recorded during visits 1, 3, and 5, the transit of planet c
was observed twice during visits 2 and 4, and a single transit of planet d (in
multiple transit feature with planet c) was detected during the CHEOPS visit
4. Further details about these observations can be found in Table 2.

Table 2: Log of CHEOPS photometric observations of HD 22946.

Visit | Start date | End date | File | CHEOPS | Integration | Number
---|---|---|---|---|---|---
No. | [UTC] | [UTC] | key | product | time [s] | of frames
1 | 2021-10-17 03:22 | 2021-10-17 14:40 | CH_PR100031_TG021201 | Subarray | $2\times 20.0$ | 629
1 | 2021-10-17 03:22 | 2021-10-17 14:40 | CH_PR100031_TG021201 | Imagettes | 20.0 | 1258
2 | 2021-10-18 08:14 | 2021-10-18 19:04 | CH_PR100031_TG021101 | Subarray | $2\times 20.0$ | 637
2 | 2021-10-18 08:14 | 2021-10-18 19:04 | CH_PR100031_TG021101 | Imagettes | 20.0 | 1274
3 | 2021-10-25 07:08 | 2021-10-25 19:49 | CH_PR110048_TG010001 | Subarray | $2\times 20.4$ | 708
3 | 2021-10-25 07:08 | 2021-10-25 19:49 | CH_PR110048_TG010001 | Imagettes | 20.4 | 1416
4 | 2021-10-28 02:12 | 2021-10-28 13:50 | CH_PR110048_TG010101 | Subarray | $2\times 20.4$ | 666
4 | 2021-10-28 02:12 | 2021-10-28 13:50 | CH_PR110048_TG010101 | Imagettes | 20.4 | 1332
5 | 2021-10-29 08:48 | 2021-10-29 18:14 | CH_PR100031_TG021202 | Subarray | $2\times 20.0$ | 555
5 | 2021-10-29 08:48 | 2021-10-29 18:14 | CH_PR100031_TG021202 | Imagettes | 20.0 | 1110

333Table shows the time interval of individual observations, the file key,
which supports fast identification of the observations in the CHEOPS archive,
type of the photometric product (for more details see Sect. 2.2), the applied
integration time, co-added exposures at the subarray type CHEOPS product, and
the number of obtained frames.

From the CHEOPS detector, which has $1024\times 1024$ pixels, a $200\times
200$ pixels subarray is extracted around the target point-spread function
(PSF), which is used to compute the photometry. This type of photometry
product was processed by the CHEOPS Data Reduction Pipeline (DRP) version
13.1.0 (Hoyer et al., 2020). It performs several image corrections, including
bias-, dark-, and flat-corrections, contamination estimation, and background-
star correction. The DRP pipeline produces four different light-curve types
for each visit, but we initially analysed only the decontaminated ‘OPTIMAL’
type, where the aperture radius is automatically set based on the signal-to-
noise ratio ($S/N$). In addition to the subarrays, there are imagettes
available for each exposure. The imagettes are frames of 30 pixels in radius
centred on the target, which do not need to be co-added before download owing
to their smaller size. We used a tool specifically developed for photometric
extraction of imagettes using point-spread function photometry, called
PIPE444See https://github.com/alphapsa/PIPE.; see for example Szabó et al.
(2021, 2022). The PIPE photometry has a $S/N$ comparable to that of DRP
photometry, but has the advantage of shorter cadence, and therefore we decided
to use this CHEOPS product in this work. The average uncertainty of the PIPE
data points is 160 ppm.

The PIPE CHEOPS observations were processed using the dedicated data
decorrelation and transit analysis software called pycheops555See
https://github.com/pmaxted/pycheops. (Maxted et al., 2022). This package
includes downloading, visualising, and decorrelating CHEOPS data, fitting
transits and eclipses of exoplanets, and calculating light-curve noise. We
first cleaned the light curves from outlier data points using the pycheops
built-in function clip_outliers, which removes outliers from a dataset by
calculating the mean absolute deviation ($MAD$) from the light curve following
median smoothing, and rejects data greater than the smoothed dataset plus the
$MAD$ multiplied by a clipping factor. The clipping factor equal to five was
reasonable in our cases, which we checked visually. With this clipping
procedure, we discarded 30 data points out of 3195, which is $\sim 0.9\%$ of
the CHEOPS data. The next step was the extraction of the detrending
parameters. During this procedure, the software gives a list of the parameters
necessary for the detrending. The most important decorrelation is subtraction
of the roll-angle effect. In order to keep the cold plate radiators facing
away from the Earth, the spacecraft rolls during its orbit. This means that
the field of view rotates around the pointing direction. The target star
remains stationary within typically 1 pixel, but the rotation of the field of
view produces a variation of its flux from the nearby sources in phase with
the roll angle of the spacecraft (Bonfanti et al., 2021). The extracted
detrending parameters were co-fitted with the transit model (see Sect. 3.3).

###  2.3 ESPRESSO/VLT data

We acquired 14 high-resolution spectra of the host star HD 22946 using the
ESPRESSO spectrograph (Pepe et al., 2014) mounted at the 8.2 m Very Large
Telescope (VLT) at Paranal Observatory (Chile). The observations were carried
out between 10 February 2019 and 17 March 2019 under the observing program
number 0102.C-0456 (PI: V. Van Eylen) and within the KESPRINT666See
https://kesprint.science/. project. We used the high-resolution (HR) mode of
the spectrograph, which provides a resolving power of
$R\,\approx\,134\leavevmode\nobreak\ 000$. We set the exposure time to 600 s,
leading to a $S/N$ per pixel at 650 nm ranging between 120 and 243. Daytime
ThAr spectra and simultaneous Fabry-Perot exposures were taken to determine
the wavelength solution and correct for possible nightly instrumental drifts,
respectively. We reduced the ESPRESSO spectra using the dedicated data-
reduction software and extracted the RVs by cross-correlating the échelle
spectra with a G2 numerical mask. We list the ESPRESSO RV measurements in
Table 3. The average uncertainty of the RV data points is $\sim
0.00015\leavevmode\nobreak\ \mathrm{km\leavevmode\nobreak\ s}^{-1}$.

We co-added the individual ESPRESSO spectra prior to carrying out the
spectroscopic analysis presented in Sect. 3.1. To this aim, we Doppler-shifted
the data to a common reference wavelength by cross-correlating the ESPRESSO
spectra with the spectrum with the highest $S/N$. We finally performed a
$S/N$-weighted co-addition of the Doppler-shifted spectra, while applying a
sigma-clipping algorithm to remove possible cosmic-ray hits and outliers. The
co-added spectrum has a $S/N$ of $\sim 900$ per pixel at 650 nm.

Table 3: Log of ESPRESSO/VLT RV observations of HD 22946. Time [$\mathrm{BJD_{TDB}}$] | RV value [$\mathrm{km\leavevmode\nobreak\ s}^{-1}$] |  $\pm 1\sigma$ [$\mathrm{km\leavevmode\nobreak\ s}^{-1}$]
---|---|---
2458524.56069831 | 16.85125 | 0.00011
2458525.55490396 | 16.85217 | 0.00013
2458526.59541816 | 16.85512 | 0.00011
2458527.63233315 | 16.85284 | 0.00022
2458535.62345024 | 16.84839 | 0.00036
2458540.53620531 | 16.85020 | 0.00010
2458550.57174504 | 16.85549 | 0.00020
2458552.56783808 | 16.85330 | 0.00016
2458553.51738686 | 16.86251 | 0.00011
2458556.50131285 | 16.85536 | 0.00014
2458557.50492574 | 16.85738 | 0.00009
2458557.56483059 | 16.85716 | 0.00010
2458558.52709593 | 16.85741 | 0.00010
2458559.54006749 | 16.85690 | 0.00016

##  3 Data analysis and first results

###  3.1 Stellar parameters

The spectroscopic stellar parameters (the effective temperature
$T_{\mathrm{eff}}$, the surface gravity $\log g$, the microturbulent velocity
$v_{\mathrm{mic}}$, and the metallicity [Fe/H]; see Table 4) were derived
using the ARES and MOOG codes, following the same methodology as described in
Sousa et al. (2021), Sousa (2014), and Santos et al. (2013). We used the
latest version of the ARES code777The last version, ARES v2, can be downloaded
at https://github.com/sousasag/ARES. (Sousa et al., 2007, 2015) to measure the
equivalent widths of iron lines on the combined ESPRESSO spectrum. We used a
minimisation procedure to find ionisation and excitation equilibrium and
converge to the best set of spectroscopic parameters. This procedure makes use
of a grid of Kurucz model atmospheres (Kurucz, 1993a) and the radiative
transfer code MOOG (Sneden, 1973).

To derive the radius of the host star HD 22946, we used a Markov-Chain Monte
Carlo (MCMC) modified infrared flux method. This enables us to calculate the
bolometric flux using stellar atmospheric models defined by our spectral
analysis to build spectral energy distributions (SEDs) that are compared with
broadband fluxes and uncertainties from the most recent data releases for the
following bandpasses: Gaia $G$, $G_{\mathrm{BP}}$, and $G_{\mathrm{RP}}$,
2MASS $J$, $H$, and $K$, and WISE $W1$ and $W2$ (Skrutskie et al., 2006;
Wright et al., 2010; Gaia Collaboration et al., 2021). From the bolometric
flux, we then determine stellar effective temperature and angular diameter;
this latter is converted to a radius using the offset-corrected Gaia parallax
Lindegren et al. (2021). We used Bayesian modeling averaging of the atlas
(Kurucz, 1993b; Castelli & Kurucz, 2003) and phoenix (Allard, 2014) catalogues
to produce a weighted averaged posterior distribution of the stellar radius in
order to account for uncertainties in stellar atmospheric modelling. We find a
value of $R_{\mathrm{s}}=1.117\pm 0.009\,\mathrm{R}_{\odot}$, which is in
$3\sigma$ agreement with the value of $1.157\pm 0.025\leavevmode\nobreak\
\mathrm{R}_{\odot}$ presented by the discoverers.

We finally determined the stellar mass $M_{\mathrm{s}}$ and stellar age
$t_{\mathrm{s}}$ using two different sets of stellar evolutionary models,
namely PARSEC888PAdova and TRieste Stellar Evolutionary Code:
http://stev.oapd.inaf.it/cgi-bin/cmd v1.2S (Marigo et al., 2017) and CLES
(Code Liègeois d’Évolution Stellaire), see Scuflaire et al. (2008). More
specifically, we employed the isochrone-placement algorithm developed by
Bonfanti et al. (2015, 2016) to interpolate the input parameters
($T_{\mathrm{eff}}$, [Fe/H], $R_{\mathrm{s}}$) within pre-computed grids of
PARSEC v1.2S isochrones and tracks to derive a first pair of mass and age. A
second pair of mass and age values, instead, was retrieved by inputting
$T_{\mathrm{eff}}$, [Fe/H], and $R_{\mathrm{s}}$ directly in the CLES code,
which generates the best-fit stellar evolutionary track following the
Levenberg-Marquadt minimisation scheme, as described in Salmon et al. (2021).
After carefully checking the mutual consistency of the two respective pairs of
outcomes through the $\chi^{2}$-based methodology presented in Bonfanti et al.
(2021), we finally merged (i.e. summed) the two $M_{\mathrm{s}}$ and
$t_{\mathrm{s}}$ results and obtained $M_{\mathrm{s}}=1.098\pm
0.040\leavevmode\nobreak\ \mathrm{M}_{\odot}$ and $t_{\mathrm{s}}=2.5\pm 1.0$
Gyr. The mass parameter value of the host star agrees within the uncertainty
with the value provided in the discovery paper, which is $1.104\pm
0.012\leavevmode\nobreak\ \mathrm{M}_{\odot}$. However, the planet host seems
to be younger than previously presented by C22. The discoverers obtained a
value of $5.0\pm 1.0$ Gyr. More parameter values, including from this work,
are compared with the discovery-paper parameter values in Table 4.

Table 4: Fundamental parameters of the exoplanet host HD 22946.

Parameter [unit] | Value | Source
---|---|---
Name | HD 22946 | –
TOI ID | 411 | G2021
TIC ID | 100990000 | S2018
Gaia DR3 ID | 4848767461548943104 | G2022
RA (J2016) [deg] | $54.819528$ | G2022
Dec (J2016) [deg] | $-42.76304$ | G2022
$T$ (TESS) [mag] | $7.757\pm 0.006$ | S2018
$G$ (Gaia) [mag] | $8.13\pm 0.69$ | G2022
$J$ [mag] | $7.250\pm 0.027$ | C2003
$H$ [mag] | $7.040\pm 0.044$ | C2003
$K$ [mag] | $6.981\pm 0.029$ | C2003
$T_{\mathrm{eff}}$ [K] | $6040\pm 48$ | C2022
$T_{\mathrm{eff}}$ [K] | $6169\pm 64$ | This work
$R_{\mathrm{s}}$ [$R_{\odot}$] | $1.157\pm 0.025$ | C2022
$R_{\mathrm{s}}$ [$R_{\odot}$] | $1.117\pm 0.009$ | This work
$M_{\mathrm{s}}$ [$M_{\odot}$] | $1.104\pm 0.012$ | C2022
$M_{\mathrm{s}}$ [$M_{\odot}$] | $1.098^{+0.040}_{-0.039}$ | This work
$\log g$ [cgs] | $4.26\pm 0.15$ | C2022
$\log g$ [cgs] | $4.47\pm 0.11$ | This work
$[\mathrm{Fe/H}]$ [dex] | $-0.14\pm 0.07$ | C2022
$[\mathrm{Fe/H}]$ [dex] | $-0.08\pm 0.04$ | This work
$t_{\mathrm{s}}$ [Gyr] | $5.0\pm 1.0$ | C2022
$t_{\mathrm{s}}$ [Gyr] | $2.5\pm 1.0$ | This work
$v_{\mathrm{mic}}$ [km s-1] | $1.25\pm 0.03$ | This work
999Abbreviations refer to the following sources: G2021 = Guerrero et al.
(2021), S2018 = Stassun et al. (2018), G2022 = Gaia Collaboration et al.
(2022), C2003 = Cutri et al. (2003), C2022 = Cacciapuoti et al. (2022).

###  3.2 Period aliases of HD 22946d from the TESS data

In order to determine each possible period alias and to schedule CHEOPS
observations of planet d, we first performed a period analysis of the
available TESS data. For this purpose, we used the MonoTools package101010See
https://github.com/hposborn/MonoTools. (Osborn et al., 2022), which is able to
model transit light curves in case of multiple transits, duotransits, and
monotransits, as well as multiple systems with combinations of such
candidates, with both radial velocities and transit photometry. The package
calculates a marginalised probability distribution across all allowed aliases
for a given transit model by combining priors for each alias. The
probabilities are estimated based on two major assumptions, namely that short-
period orbits are highly favoured over long-period ones due to a combination
of geometric probability and window function, and that planets in multi-planet
systems have low eccentricities (Kipping et al., 2013; Kipping, 2018; Van
Eylen & Albrecht, 2015). More details about this software can be found in
Osborn et al. (2022).

The TESS data described in Sect. 2.1 were used during the fitting procedure
using MonoTools. In the case of planet b, we set as input parameters the
reference mid-transit time of $T_{\mathrm{c}}=2\leavevmode\nobreak\
458\leavevmode\nobreak\ 385.7318$ $\mathrm{BJD}_{\mathrm{TDB}}$, the orbital
period of $P_{\mathrm{orb}}=4.040330\pm 0.000010$ d, the transit duration
(transit width) of $W=3.4$ hr, and the transit depth of $D=134$ ppm. In the
case of planet c, the inputs were $T_{\mathrm{c}}=2\leavevmode\nobreak\
458\leavevmode\nobreak\ 386.1878$ $\mathrm{BJD}_{\mathrm{TDB}}$,
$P_{\mathrm{orb}}=9.573117\pm 0.000020$ d, $W=3.8$ hr, and $D=389$ ppm. For
planet d, we set as input parameters the two mid-transit times detected by
TESS, namely $t_{\mathrm{tr,1}}=2\leavevmode\nobreak\ 458\leavevmode\nobreak\
425.1657$ $\mathrm{BJD}_{\mathrm{TDB}}$ and
$t_{\mathrm{tr,2}}=2\leavevmode\nobreak\ 459\leavevmode\nobreak\ 136.5357$
$\mathrm{BJD}_{\mathrm{TDB}}$, the transit duration of $W=6.5$ hr and the
transit depth of $D=478$ ppm. These parameters were calculated from the TESS
data alone.

The orbital period aliases of planet d with a probability of $p>1\%$ are
listed in Table 5. The software MonoTools forecasted that a transit of planet
d with the orbital period alias number 2 would take place on 25 October 2021,
with a mid-transit time of $T_{\mathrm{c}}=2\leavevmode\nobreak\
459\leavevmode\nobreak\ 513.1441$ $\mathrm{BJD}_{\mathrm{TDB}}$. This
forecasted event was observed during the third CHEOPS visit (see Table 2), but
the expected transit of planet d did not happen; only the transit of planet b
was recorded that time. After this observation, we were able to exclude the
period alias of $P=41.8454$ d from the list of possible aliases. The next
forecast predicted a transit of planet d on 28 October 2021, with a mid-
transit time of $T_{\mathrm{c}}=2\leavevmode\nobreak\ 459\leavevmode\nobreak\
515.9338$ $\mathrm{BJD}_{\mathrm{TDB}}$, which means that, in this case, the
alias number 4 (see Table 5) was preferred as its true orbital period. This
forecasted event was observed with CHEOPS during its fourth visit. This time,
the transit of planet d was successfully detected together with a transit of
planet c, confirming that the period alias of $P=47.4248$ d is the true
orbital period of planet d. This result also confirms that the second transit-
like feature of planet d, observed by TESS in sector number 30, was a real
transit event and not an instrumental artifact as considered by C22.
Alternatively, the dip observed at $2\leavevmode\nobreak\
459\leavevmode\nobreak\ 136.5357\leavevmode\nobreak\
\mathrm{BJD}_{\mathrm{TDB}}$ was a mixture of instrumental effects and the
transit of planet d. With this gathered knowledge about the true orbital
period of planet d, we were able to combine CHEOPS and TESS photometric
observations and RV measurements in order to improve the orbital and planetary
parameters of the HD 22946 system, which were previously obtained only from
the TESS and RV data by the discoverers.

Table 5: Orbital period aliases of the planet HD 22946d.

Alias | Period alias ($P$) | Probability ($p$)
---|---|---
No. | [d] | [%]
1 | 39.5206 | $17.420$
2 | 41.8454 | $20.078$
3 | 44.4607 | $20.341$
4 | 47.4248 | $18.113$
5 | 50.8122 | $13.445$
6 | 54.7209 | $7.061$
7 | 59.2809 | $2.756$
8 | 64.6701 | $\sim 1.0$
111111Only the period aliases with a probability of $p>1\%$ are listed here,
as calculated by the MonoTools package from TESS data alone, i.e. before
CHEOPS observations.

Table 6: Best-fitting and derived system and planetary parameters of the HD
22946 planetary system.

Parameter [unit] | Description | HD 22946b | HD 22946c | HD 22946d
---|---|---|---|---
$T_{\mathrm{c}}$ [$\mathrm{BJD}_{\mathrm{TDB}}$] | reference mid-transit time | $2\leavevmode\nobreak\ 458\leavevmode\nobreak\ 385.7321^{+0.0022}_{-0.0031}$ | $2\leavevmode\nobreak\ 459\leavevmode\nobreak\ 161.60861^{+0.00069}_{-0.00072}$ | $2\leavevmode\nobreak\ 459\leavevmode\nobreak\ 136.53720^{+0.00087}_{-0.00083}$
$P_{\mathrm{orb}}$ [d] | orbital period | $4.040295^{+0.000015}_{-0.000014}$ | $9.573083\pm 0.000014$ | $47.42489^{+0.00010}_{-0.00011}$
$b$ | impact parameter | $0.21^{+0.11}_{-0.13}$ | $0.504^{+0.024}_{-0.026}$ | $0.456^{+0.026}_{-0.028}$
$a/R_{\mathrm{s}}$ | scaled semi-major axis | $11.03\pm 0.12$ | $19.61^{+0.22}_{-0.23}$ | $57.00\pm 0.66$
$a$ [au] | semi-major axis | $0.05727^{+0.00085}_{-0.00082}$ | $0.1017^{+0.0015}_{-0.0014}$ | $0.2958^{+0.0044}_{-0.0042}$
$R_{\mathrm{p}}/R_{\mathrm{s}}$ | planet-to-star radius ratio | $0.01119^{+0.00031}_{-0.00032}$ | $0.01912^{+0.00026}_{-0.00027}$ | $0.02141^{+0.00046}_{-0.00045}$
$t_{\mathrm{dur}}$ [d] | transit duration | $0.1281^{+0.0026}_{-0.0037}$ | $0.1535^{+0.0015}_{-0.0014}$ | $0.2701^{+0.0019}_{-0.0020}$
$R_{\mathrm{p}}$ [$\mathrm{R}_{\oplus}$] | planet radius | $1.362\pm 0.040$ | $2.328^{+0.038}_{-0.039}$ | $2.607\pm 0.060$
$M_{\mathrm{p}}$ [$\mathrm{M}_{\oplus}$] |  planet mass⋆ | $13.71$ | $9.72$ | $26.57$
$M_{\mathrm{p,est}}$ [$\mathrm{M}_{\oplus}$] |  estimated planet mass♣ | $2.42\pm 0.12$ | $6.04\pm 0.17$ | $7.32\pm 0.28$
$M_{\mathrm{p,est}}$ [$\mathrm{M}_{\oplus}$] |  estimated planet mass♡ | $2.61\pm 0.27^{\dagger}$ | $6.61\pm 0.17^{\ddagger}$ | $7.90\pm 0.28^{\ddagger}$
$\rho_{\mathrm{p}}$ [$\mathrm{g\leavevmode\nobreak\ cm}^{-3}$] |  planet density⋆ | $18.96$ | $3.15$ | $10.80$
$K$ [$\mathrm{m\leavevmode\nobreak\ s}^{-1}$] |  RV semi-amplitude⋆ | $5.05$ | $2.70$ | $4.31$
$I_{\mathrm{p}}$ [$\mathrm{W\leavevmode\nobreak\ m}^{-2}$] | insolation flux | $673\leavevmode\nobreak\ 884^{+32\leavevmode\nobreak\ 444}_{-31\leavevmode\nobreak\ 606}$ | $213\leavevmode\nobreak\ 337^{+10\leavevmode\nobreak\ 270}_{-10\leavevmode\nobreak\ 006}$ | $25\leavevmode\nobreak\ 261^{+1216}_{-1184}$
$T_{\mathrm{surf}}$ [K] |  surface temperature⋄ | $1241\pm 14$ | $931\pm 11$ | $546\pm 6$
TSM |  transmission spectroscopy metric♯ | $43\pm 4$ | $63\pm 2$ | $43\pm 2$

121212Based on the joint fit of the TESS and CHEOPS photometric data and RV
observations. Table shows the best-fitting value of the given parameter and
its $\pm 1\sigma$ uncertainty. The fitted values correspond to quantile 0.50
(median) and the uncertainties to quantils $\pm 0.341$ in the parameter
distributions obtained from the samples. ⋆Only the $3\sigma$ upper limits are
listed here due to the low number of the RV observations. ⋄Assuming the albedo
value of 0.2. ♣Based on the relations presented by Chen & Kipping (2017),
assuming that the planet radii are from the interval of
$1.23<R_{\mathrm{p}}<14.26\leavevmode\nobreak\ \mathrm{R}_{\oplus}$. ♡Based on
the relations presented by Otegi et al. (2020). †Assuming that
$\rho_{\mathrm{p}}>3.3\leavevmode\nobreak\ \mathrm{g\leavevmode\nobreak\
cm}^{-3}$. ‡Assuming that $\rho_{\mathrm{p}}<3.3\leavevmode\nobreak\
\mathrm{g\leavevmode\nobreak\ cm}^{-3}$. ♯Based on the criteria set by Kempton
et al. (2018), using the scale factor of 1.26, the stellar radius of
$R_{\mathrm{s}}=1.117\pm 0.009\leavevmode\nobreak\ \mathrm{R_{\odot}}$ and
$J=7.250\pm 0.027$ mag (see Table 4).

###  3.3 CHEOPS, TESS, and RV combined model

In order to produce accurate planetary parameters for all three planets, we
built a combined model using all available data, that is, TESS photometry
(described in Sect. 2.1), CHEOPS photometry (described in Sect. 2.2), and
ESPRESSO RVs (described in Sect. 2.3). The combined model was built using the
PyMC3 package131313See https://pypi.org/project/pymc3/. (Salvatier et al.,
2016), which performs Hamiltonian Monte Carlo (HMC) sampling, with Keplerian
orbits modeled with exoplanet package141414See
https://pypi.org/project/exoplanet/. (Foreman-Mackey et al., 2021). We used
Gaussian processes (GPs) to model the stellar variability present in the TESS
light curve, opting for a simple harmonic oscillator (SHO) kernel implemented
in the celerite package (Foreman-Mackey et al., 2017) and a quality factor
$Q=1/\sqrt{2,}$ as is common for quasi-periodic stellar variability. In order
to speed up sampling, we binned the TESS data to 30 minute bins far from
transits, keeping 2 minute data near transit. As we have reasonable prior
knowledge from theoretical analyses for the expected stellar limb-darkening
(LD) parameters for HD 22946, we used these as priors in the analysis. We used
the quadratic LD law and interpolated tables of coefficients calculated for
the TESS (Claret, 2018) and CHEOPS (Claret, 2021) passbands using the derived
stellar parameters of $T_{\mathrm{eff}}=6169$ K and $\log g=4.47$ (cgs). In
order to guard against systematic errors, we inflated the $\sigma$ for each
parameter prior to 0.1.

Even though the PIPE light curves for HD 22946 have fewer systematic features
than the DRP light curves, they can still include flux variations due to the
influence of various external factors. Therefore, we can improve the light
curve by decorrelating the flux data against metadata generated for the
instrument and target. To decipher which decorrelation vectors provide
improvement, we ran an initial PyMC3 model for each CHEOPS visit using all
available ancillary data – $\sin$ and $\cos$ of rollangle, background flux,
$x$ and $y$ centroid positions, onboard temperature and time (which also fits
short-timescale stellar variability). These parameters are normalised to have
$\mu=0.0$ and $\sigma=1.0$, and decorrelation parameters are given normal
priors with $\mu=0.0$ and $\sigma$ set by the root-mean-square (RMS) noise for
each CHEOPS visit. For each visit model, we also included parameters for any
planetary transits present in order to ensure the transits would not bias the
model. After HMC sampling, we assessed each decorrelation parameter using the
average and standard deviations, keeping only those parameters with a Bayes
Factor of BF ¿ 1. Despite this detrending, shorter-timescale variation can
also be present as a function of roll angle ($\varphi$). Pure detrending
against $\sin$ and $\cos$ of roll angle removes the largest amplitude
systematic trends at low frequencies. These are those closest in timescale to
the transit feature, and so a simpler detrending technique for such timescales
guards against over-fitting of the transit. However, the CHEOPS light curve
typically also contains systematic noise correlated with roll angle that is at
a lower amplitude and higher frequency. This is not therefore adequately
removed by simple $\sin$ and $\cos$ decorrelation. It is this noise that a
more flexible GP is better able to model. We therefore also included a GP to
model the variation of flux with roll-angle effects. To do this, we first
found any potential large jumps in $\varphi$ and made sure the time series was
continuous between these jumps (i.e. by moving the zero point and ‘wrapping
around’). We then transformed the input data such that it is continuous in $x$
—by sorting by $\varphi$ rather than time. Once again, we used a SHO kernel
from celerite with quality factor $Q$ set at $1/\sqrt{2}$. As we expected the
morphology of the variations to be preserved for all CHEOPS visits, we used a
single shared kernel. We found that the linear decorrelation is the most
important, decreasing the $\log$ likelihood by a factor of 1400, but the GP is
responsible for a reduction of a further 450, which means that use of a GP to
model roll-angle flux behaviour is well justified.

As multi-planet systems typically have low eccentricities $e$ (Van Eylen et
al., 2019), and we lack the high number of RVs capable of resolving any
differences in $e$, we chose to fit only circular orbits. In order to guard
against unphysical negative values, we used broad log-normal priors for the
key transit and RV amplitude parameters, that is, for
$R_{\mathrm{p}}/R_{\mathrm{s}}$ (planet-to-star radius ratio) and $K$ (RV
semi-amplitude). The quantities derived in Sect. 3.1 are used as priors on the
stellar parameters in the model. For all datasets —CHEOPS, TESS, and
ESPRESSO—, we included a jitter term using a wide log-normal prior. We then
sampled the combined model using the PyMC_ext ’sample’ function, which is
specifically written for astrophysical applications, and allows us to group