11institutetext: Department of Astronomy, University of Massachusetts,
Amherst, MA 01003, USA 22institutetext: Physics and Astronomy Department,
University of California, 900 University Ave., Riverside, CA 92521, USA
33institutetext: Cosmic Dawn Center (DAWN), Denmark 44institutetext: Niels
Bohr Institute, University of Copenhagen, Jagtvej 128, 2200 Copenhagen,
Denmark 55institutetext: Institute for Astronomy, University of Hawaii, 2680
Woodlawn Drive, Honolulu, HI 96822, USA 66institutetext: Cosmic Dawn Center
(DAWN) 77institutetext: Institut d’Astrophysique de Paris, UMR 7095, CNRS, and
Sorbonne Université, 98 bis boulevard Arago, 75014 Paris, France
88institutetext: Jodrell Bank Centre for Astrophysics, Department of Physics
and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK
99institutetext: Jet Propulsion Laboratory, California Institute of
Technology, 4800 Oak Grove Drive, Pasadena, CA, 91109, USA 1010institutetext:
Department of Astronomy, School of Science, The University of Tokyo, 7-3-1
Hongo, Bunkyo, Tokyo 113-0033, Japan 1111institutetext: Max-Planck-Institut
für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany 1212institutetext:
INAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Via Piero
Gobetti 93/3, 40129 Bologna, Italy 1313institutetext: Department of Astronomy,
University of Geneva, ch. d’Ecogia 16, 1290 Versoix, Switzerland
1414institutetext: School of Physical Sciences, The Open University, Milton
Keynes, MK7 6AA, UK 1515institutetext: Astrophysics Group, Blackett
Laboratory, Imperial College London, London SW7 2AZ, UK 1616institutetext:
Department of Mathematics, Imperial College London, London SW7 2AZ, UK
1717institutetext: School of Physics and Astronomy, University of Nottingham,
University Park, Nottingham NG7 2RD, UK 1818institutetext: Max Planck
Institute for Extraterrestrial Physics, Giessenbachstr. 1, 85748 Garching,
Germany 1919institutetext: Dipartimento di Fisica e Astronomia ”G. Galilei”,
Università di Padova, Via Marzolo 8, 35131 Padova, Italy 2020institutetext:
INAF-Osservatorio Astronomico di Padova, Via dell’Osservatorio 5, 35122
Padova, Italy 2121institutetext: Instituto de Física de Cantabria, Edificio
Juan Jordá, Avenida de los Castros, 39005 Santander, Spain 2222institutetext:
Aix-Marseille Université, CNRS, CNES, LAM, Marseille, France
2323institutetext: Institute for Astronomy, University of Edinburgh, Royal
Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK 2424institutetext: Institut
d’Astrophysique de Paris, 98bis Boulevard Arago, 75014, Paris, France
2525institutetext: Université Paris-Saclay, CNRS, Institut d’astrophysique
spatiale, 91405, Orsay, France 2626institutetext: Observatoire Astronomique de
Strasbourg (ObAS), Université de Strasbourg - CNRS, UMR 7550, Strasbourg,
France 2727institutetext: Kapteyn Astronomical Institute, University of
Groningen, PO Box 800, 9700 AV Groningen, The Netherlands 2828institutetext:
ESAC/ESA, Camino Bajo del Castillo, s/n., Urb. Villafranca del Castillo, 28692
Villanueva de la Cañada, Madrid, Spain 2929institutetext: HE Space for
European Space Agency (ESA), Camino bajo del Castillo, s/n, Urbanizacion
Villafranca del Castillo, Villanueva de la Cañada, 28692 Madrid, Spain
3030institutetext: Université Paris-Saclay, Université Paris Cité, CEA, CNRS,
AIM, 91191, Gif-sur-Yvette, France 3131institutetext: European Space
Agency/ESTEC, Keplerlaan 1, 2201 AZ Noordwijk, The Netherlands
3232institutetext: Department of Physics, Université de Montréal, 2900 Edouard
Montpetit Blvd, Montréal, Québec H3T 1J4, Canada 3333institutetext: School of
Mathematics and Physics, University of Surrey, Guildford, Surrey, GU2 7XH, UK
3434institutetext: INAF-Osservatorio Astronomico di Brera, Via Brera 28, 20122
Milano, Italy 3535institutetext: Dipartimento di Fisica e Astronomia,
Università di Bologna, Via Gobetti 93/2, 40129 Bologna, Italy
3636institutetext: INFN-Sezione di Bologna, Viale Berti Pichat 6/2, 40127
Bologna, Italy 3737institutetext: Universitäts-Sternwarte München, Fakultät
für Physik, Ludwig-Maximilians-Universität München, Scheinerstrasse 1, 81679
München, Germany 3838institutetext: INAF-Osservatorio Astrofisico di Torino,
Via Osservatorio 20, 10025 Pino Torinese (TO), Italy 3939institutetext:
Dipartimento di Fisica, Università di Genova, Via Dodecaneso 33, 16146,
Genova, Italy 4040institutetext: INFN-Sezione di Genova, Via Dodecaneso 33,
16146, Genova, Italy 4141institutetext: Department of Physics ”E. Pancini”,
University Federico II, Via Cinthia 6, 80126, Napoli, Italy 4242institutetext:
INAF-Osservatorio Astronomico di Capodimonte, Via Moiariello 16, 80131 Napoli,
Italy 4343institutetext: INFN section of Naples, Via Cinthia 6, 80126, Napoli,
Italy 4444institutetext: Instituto de Astrofísica e Ciências do Espaço,
Universidade do Porto, CAUP, Rua das Estrelas, PT4150-762 Porto, Portugal
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Campo de Alegre, 4150-007 Porto, Portugal 4646institutetext: Dipartimento di
Fisica, Università degli Studi di Torino, Via P. Giuria 1, 10125 Torino, Italy
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Italy 4848institutetext: INAF-IASF Milano, Via Alfonso Corti 12, 20133 Milano,
Italy 4949institutetext: INAF-Osservatorio Astronomico di Roma, Via Frascati
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Madrid, Spain 5252institutetext: Port d’Informació Científica, Campus UAB, C.
Albareda s/n, 08193 Bellaterra (Barcelona), Spain 5353institutetext: Institute
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52056 Aachen, Germany 5454institutetext: Institute of Space Sciences (ICE,
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5555institutetext: Institut d’Estudis Espacials de Catalunya (IEEC), Edifici
RDIT, Campus UPC, 08860 Castelldefels, Barcelona, Spain 5656institutetext:
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Università di Bologna, Viale Berti Pichat 6/2, 40127 Bologna, Italy
5757institutetext: European Space Agency/ESRIN, Largo Galileo Galilei 1, 00044
Frascati, Roma, Italy 5858institutetext: Université Claude Bernard Lyon 1,
CNRS/IN2P3, IP2I Lyon, UMR 5822, Villeurbanne, F-69100, France
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Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, 1290
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Lyon, 4 rue Enrico Fermi, 69622 Villeurbanne, France 6161institutetext:
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Edifício C8, Campo Grande, PT1749-016 Lisboa, Portugal 6262institutetext:
Instituto de Astrofísica e Ciências do Espaço, Faculdade de Ciências,
Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
6363institutetext: INAF-Istituto di Astrofisica e Planetologia Spaziali, via
del Fosso del Cavaliere, 100, 00100 Roma, Italy 6464institutetext: School of
Physics, HH Wills Physics Laboratory, University of Bristol, Tyndall Avenue,
Bristol, BS8 1TL, UK 6565institutetext: INAF-Osservatorio Astronomico di
Trieste, Via G. B. Tiepolo 11, 34143 Trieste, Italy 6666institutetext: Aix-
Marseille Université, CNRS/IN2P3, CPPM, Marseille, France 6767institutetext:
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Via Irnerio 46,
40126 Bologna, Italy 6868institutetext: FRACTAL S.L.N.E., calle Tulipán 2,
Portal 13 1A, 28231, Las Rozas de Madrid, Spain 6969institutetext:
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Via Celoria 16, 20133 Milano, Italy 7070institutetext: Institute of
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Oslo, Norway 7171institutetext: Leiden Observatory, Leiden University,
Einsteinweg 55, 2333 CC Leiden, The Netherlands 7272institutetext: Department
of Physics, Lancaster University, Lancaster, LA1 4YB, UK 7373institutetext:
Felix Hormuth Engineering, Goethestr. 17, 69181 Leimen, Germany
7474institutetext: Technical University of Denmark, Elektrovej 327, 2800 Kgs.
Lyngby, Denmark 7575institutetext: NASA Goddard Space Flight Center,
Greenbelt, MD 20771, USA 7676institutetext: Department of Physics and Helsinki
Institute of Physics, Gustaf Hällströmin katu 2, 00014 University of Helsinki,
Finland 7777institutetext: Mullard Space Science Laboratory, University
College London, Holmbury St Mary, Dorking, Surrey RH5 6NT, UK
7878institutetext: Université de Genève, Département de Physique Théorique and
Centre for Astroparticle Physics, 24 quai Ernest-Ansermet, CH-1211 Genève 4,
Switzerland 7979institutetext: Department of Physics, P.O. Box 64, 00014
University of Helsinki, Finland 8080institutetext: Helsinki Institute of
Physics, Gustaf Hällströmin katu 2, University of Helsinki, Helsinki, Finland
8181institutetext: Department of Physics and Astronomy, University College
London, Gower Street, London WC1E 6BT, UK 8282institutetext: NOVA optical
infrared instrumentation group at ASTRON, Oude Hoogeveensedijk 4, 7991PD,
Dwingeloo, The Netherlands 8383institutetext: INFN-Sezione di Milano, Via
Celoria 16, 20133 Milano, Italy 8484institutetext: Universität Bonn,
Argelander-Institut für Astronomie, Auf dem Hügel 71, 53121 Bonn, Germany
8585institutetext: Dipartimento di Fisica e Astronomia ”Augusto Righi” - Alma
Mater Studiorum Università di Bologna, via Piero Gobetti 93/2, 40129 Bologna,
Italy 8686institutetext: Department of Physics, Centre for Extragalactic
Astronomy, Durham University, South Road, DH1 3LE, UK 8787institutetext:
Infrared Processing and Analysis Center, California Institute of Technology,
Pasadena, CA 91125, USA 8888institutetext: Université Côte d’Azur,
Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, Bd de
l’Observatoire, CS 34229, 06304 Nice cedex 4, France 8989institutetext:
Université Paris Cité, CNRS, Astroparticule et Cosmologie, 75013 Paris, France
9090institutetext: University of Applied Sciences and Arts of Northwestern
Switzerland, School of Engineering, 5210 Windisch, Switzerland
9191institutetext: Institut de Física d’Altes Energies (IFAE), The Barcelona
Institute of Science and Technology, Campus UAB, 08193 Bellaterra (Barcelona),
Spain 9292institutetext: Department of Physics and Astronomy, University of
Aarhus, Ny Munkegade 120, DK-8000 Aarhus C, Denmark 9393institutetext:
Waterloo Centre for Astrophysics, University of Waterloo, Waterloo, Ontario
N2L 3G1, Canada 9494institutetext: Department of Physics and Astronomy,
University of Waterloo, Waterloo, Ontario N2L 3G1, Canada 9595institutetext:
Perimeter Institute for Theoretical Physics, Waterloo, Ontario N2L 2Y5, Canada
9696institutetext: Space Science Data Center, Italian Space Agency, via del
Politecnico snc, 00133 Roma, Italy 9797institutetext: Centre National d’Etudes
Spatiales – Centre spatial de Toulouse, 18 avenue Edouard Belin, 31401
Toulouse Cedex 9, France 9898institutetext: Institute of Space Science, Str.
Atomistilor, nr. 409 Măgurele, Ilfov, 077125, Romania 9999institutetext: INFN-
Padova, Via Marzolo 8, 35131 Padova, Italy 100100institutetext: Departamento
de Física, FCFM, Universidad de Chile, Blanco Encalada 2008, Santiago, Chile
101101institutetext: Universität Innsbruck, Institut für Astro- und
Teilchenphysik, Technikerstr. 25/8, 6020 Innsbruck, Austria
102102institutetext: Satlantis, University Science Park, Sede Bld 48940,
Leioa-Bilbao, Spain 103103institutetext: Instituto de Astrofísica e Ciências
do Espaço, Faculdade de Ciências, Universidade de Lisboa, Tapada da Ajuda,
1349-018 Lisboa, Portugal 104104institutetext: Universidad Politécnica de
Cartagena, Departamento de Electrónica y Tecnología de Computadoras, Plaza del
Hospital 1, 30202 Cartagena, Spain 105105institutetext: Institut de Recherche
en Astrophysique et Planétologie (IRAP), Université de Toulouse, CNRS, UPS,
CNES, 14 Av. Edouard Belin, 31400 Toulouse, France 106106institutetext: INFN-
Bologna, Via Irnerio 46, 40126 Bologna, Italy 107107institutetext:
Dipartimento di Fisica, Università degli studi di Genova, and INFN-Sezione di
Genova, via Dodecaneso 33, 16146, Genova, Italy 108108institutetext: INAF,
Istituto di Radioastronomia, Via Piero Gobetti 101, 40129 Bologna, Italy
109109institutetext: Institut für Theoretische Physik, University of
Heidelberg, Philosophenweg 16, 69120 Heidelberg, Germany 110110institutetext:
Université St Joseph; Faculty of Sciences, Beirut, Lebanon
111111institutetext: Junia, EPA department, 41 Bd Vauban, 59800 Lille, France
112112institutetext: IFPU, Institute for Fundamental Physics of the Universe,
via Beirut 2, 34151 Trieste, Italy 113113institutetext: SISSA, International
School for Advanced Studies, Via Bonomea 265, 34136 Trieste TS, Italy
114114institutetext: INFN, Sezione di Trieste, Via Valerio 2, 34127 Trieste
TS, Italy 115115institutetext: ICSC - Centro Nazionale di Ricerca in High
Performance Computing, Big Data e Quantum Computing, Via Magnanelli 2,
Bologna, Italy 116116institutetext: Aurora Technology for European Space
Agency (ESA), Camino bajo del Castillo, s/n, Urbanizacion Villafranca del
Castillo, Villanueva de la Cañada, 28692 Madrid, Spain 117117institutetext:
Department of Physics and Astronomy, University of British Columbia,
Vancouver, BC V6T 1Z1, Canada

#  Euclid: Early Release Observations – NISP-only sources
and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium

J. R. Weaver<EMAIL_ADDRESS>Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
S. Taamoli Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium C. J. R. McPartland Euclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid Consortium L. Zalesky Euclid:
Early Release Observations – NISP-only sources  and the search for luminous
$z=6$ – 8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium N. Allen Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
S. Toft Euclid: Early Release Observations – NISP-only sources  and the search
for luminous $z=6$ – 8 galaxies††thanks: This paper is published on behalf of
the Euclid ConsortiumEuclid: Early Release Observations – NISP-only sources
and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
D. B. Sanders Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium H. Atek Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium R. A. A. Bowler Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium D. Stern Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
C. J. Conselice Euclid: Early Release Observations – NISP-only sources  and
the search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium B. Mobasher Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium I. Szapudi Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
P. R. M. Eisenhardt Euclid: Early Release Observations – NISP-only sources
and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid Consortium G. Murphree Euclid:
Early Release Observations – NISP-only sources  and the search for luminous
$z=6$ – 8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium I. Valdes Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
K. Ito Euclid: Early Release Observations – NISP-only sources  and the search
for luminous $z=6$ – 8 galaxies††thanks: This paper is published on behalf of
the Euclid ConsortiumEuclid: Early Release Observations – NISP-only sources
and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium S. Belladitta Euclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid Consortium P. A. Oesch Euclid:
Early Release Observations – NISP-only sources  and the search for luminous
$z=6$ – 8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium S. Serjeant Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
D. J. Mortlock Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
N. A. Hatch Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium M. Kluge Euclid: Early Release
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galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium B. Milvang-Jensen Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium G. Rodighiero Euclid: Early Release
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galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid Consortium E. Bañados Euclid:
Early Release Observations – NISP-only sources  and the search for luminous
$z=6$ – 8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium J. M. Diego Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
R. Gavazzi Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
G. Congedo Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium M. Shuntov Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium H. Dole Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
P.-F. Rocci Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium T. Saifollahi Euclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid Consortium M. Miluzio Euclid:
Early Release Observations – NISP-only sources  and the search for luminous
$z=6$ – 8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid Consortium M. Ezziati Euclid:
Early Release Observations – NISP-only sources  and the search for luminous
$z=6$ – 8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium A. C. N. Hughes Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium J.-C. Cuillandre Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium R. Laureijs Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
S. Paltani Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium M. Schirmer Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium C. Stone Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
N. Aghanim Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium B. Altieri Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium A. Amara Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
S. Andreon Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium N. Auricchio Euclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium M. Baldi Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
A. Balestra Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium S. Bardelli Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium R. Bender Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium C. Bodendorf Euclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium D. Bonino Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
E. Branchini Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium M. Brescia Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium J. Brinchmann Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid Consortium S. Camera Euclid:
Early Release Observations – NISP-only sources  and the search for luminous
$z=6$ – 8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium V. Capobianco Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium C. Carbone Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
V. F. Cardone Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
J. Carretero Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
S. Casas Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium F. J. Castander Euclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid Consortium M. Castellano
Euclid: Early Release Observations – NISP-only sources  and the search for
luminous $z=6$ – 8 galaxies††thanks: This paper is published on behalf of the
Euclid ConsortiumEuclid: Early Release Observations – NISP-only sources  and
the search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium S. Cavuoti Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium A. Cimatti Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium L. Conversi Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium Y. Copin Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium L. Corcione Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
F. Courbin Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium H. M. Courtois Euclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium A. Da Silva Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium H. Degaudenzi Euclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium A. M. Di Giorgio Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium J. Dinis Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium M. Douspis Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium F. Dubath Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
X. Dupac Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium A. Ealet Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium M. Farina Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
S. Farrens Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium S. Ferriol Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium S. Fotopoulou Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium M. Frailis Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
E. Franceschi Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium P. Franzetti Euclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium S. Galeotta Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
W. Gillard Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium B. Gillis Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium C. Giocoli Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium P. Gómez-Alvarez Euclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid Consortium A. Grazian Euclid:
Early Release Observations – NISP-only sources  and the search for luminous
$z=6$ – 8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium F. Grupp Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium L. Guzzo Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid Consortium S. V. H. Haugan
Euclid: Early Release Observations – NISP-only sources  and the search for
luminous $z=6$ – 8 galaxies††thanks: This paper is published on behalf of the
Euclid ConsortiumEuclid: Early Release Observations – NISP-only sources  and
the search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium J. Hoar Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
H. Hoekstra Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium W. Holmes Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium I. Hook Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
F. Hormuth Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium A. Hornstrup Euclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid Consortium P. Hudelot Euclid:
Early Release Observations – NISP-only sources  and the search for luminous
$z=6$ – 8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium K. Jahnke Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
M. Jhabvala Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium E. Keihänen Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium S. Kermiche Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
A. Kiessling Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium T. Kitching Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium B. Kubik Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
M. Kümmel Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium M. Kunz Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium H. Kurki-Suonio Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid Consortium O. Lahav Euclid:
Early Release Observations – NISP-only sources  and the search for luminous
$z=6$ – 8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium D. Le Mignant Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium S. Ligori Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
P. B. Lilje Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium V. Lindholm Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid Consortium I. Lloro Euclid:
Early Release Observations – NISP-only sources  and the search for luminous
$z=6$ – 8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium D. Maino Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
E. Maiorano Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium O. Mansutti Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium O. Marggraf Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
K. Markovic Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium N. Martinet Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium F. Marulli Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
R. Massey Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium D. C. Masters Euclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium S. Maurogordato Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium H. J. McCracken Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium E. Medinaceli Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium S. Mei Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
M. Melchior Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium Y. Mellier Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid Consortium M. Meneghetti
Euclid: Early Release Observations – NISP-only sources  and the search for
luminous $z=6$ – 8 galaxies††thanks: This paper is published on behalf of the
Euclid ConsortiumEuclid: Early Release Observations – NISP-only sources  and
the search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid Consortium E. Merlin Euclid:
Early Release Observations – NISP-only sources  and the search for luminous
$z=6$ – 8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium G. Meylan Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
J. J. Mohr Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
M. Moresco Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
L. Moscardini Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium R. Nakajima Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium R. C. Nichol Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium S.-M. Niemi Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
C. Padilla Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium F. Pasian Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium K. Pedersen Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
W. J. Percival Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium V. Pettorino Euclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium S. Pires Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
G. Polenta Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium M. Poncet Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium L. A. Popa Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
L. Pozzetti Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium F. Raison Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium A. Renzi Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium J. Rhodes Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium G. Riccio Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
E. Romelli Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium M. Roncarelli Euclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium E. Rossetti Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
R. Saglia Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
D. Sapone Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium P. Schneider Euclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium T. Schrabback Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium A. Secroun Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
G. Seidel Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium S. Serrano Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium C. Sirignano Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid Consortium G. Sirri Euclid:
Early Release Observations – NISP-only sources  and the search for luminous
$z=6$ – 8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium L. Stanco Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
P. Tallada-Crespí Euclid: Early Release Observations – NISP-only sources  and
the search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
A. N. Taylor Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium H. I. Teplitz Euclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium I. Tereno Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium R. Toledo-Moreo Euclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium I. Tutusaus Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
L. Valenziano Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
T. Vassallo Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
A. Veropalumbo Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium Y. Wang Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium J. Weller Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium E. Zucca Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium C. Burigana Euclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium G. Castignani Euclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium Z. Sakr Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
V. Scottez Euclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium
M. Viel Euclid: Early Release Observations – NISP-only sources  and the search
for luminous $z=6$ – 8 galaxies††thanks: This paper is published on behalf of
the Euclid ConsortiumEuclid: Early Release Observations – NISP-only sources
and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid ConsortiumEuclid: Early Release Observations
– NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid ConsortiumEuclid: Early Release Observations – NISP-only
sources  and the search for luminous $z=6$ – 8 galaxies††thanks: This paper is
published on behalf of the Euclid Consortium P. Simon Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium J. Martín-Fleitas Euclid: Early Release
Observations – NISP-only sources  and the search for luminous $z=6$ – 8
galaxies††thanks: This paper is published on behalf of the Euclid
ConsortiumEuclid: Early Release Observations – NISP-only sources  and the
search for luminous $z=6$ – 8 galaxies††thanks: This paper is published on
behalf of the Euclid Consortium D. Scott Euclid: Early Release Observations –
NISP-only sources  and the search for luminous $z=6$ – 8 galaxies††thanks:
This paper is published on behalf of the Euclid ConsortiumEuclid: Early
Release Observations – NISP-only sources  and the search for luminous $z=6$ –
8 galaxies††thanks: This paper is published on behalf of the Euclid Consortium

This paper presents a search for high redshift galaxies from the Euclid Early
Release Observations program “Magnifying Lens.” The 1.5 $\deg^{2}$ area
covered by the twin Abell lensing cluster fields is comparable in size to the
few other deep near-infrared surveys such as COSMOS, and so provides an
opportunity to significantly increase known samples of rare UV-bright galaxies
at $z\approx 6$–8 ($M_{\rm UV}\lesssim-22$). Beyond their still uncertain role
in reionisation, these UV-bright galaxies are ideal laboratories from which to
study galaxy formation and constrain the bright-end of the UV luminosity
function. Of the $501\,994$ sources detected from a combined
$Y_{\scriptscriptstyle\rm E}$, $J_{\scriptscriptstyle\rm E}$, and
$H_{\scriptscriptstyle\rm E}$ NISP detection image, 168 do not have any
appreciable VIS/$I_{\scriptscriptstyle\rm E}$ flux. These objects span a range
in spectral colours, separated into two classes: 139 extremely red sources;
and 29 Lyman-break galaxy candidates. Best-fit redshifts and spectral
templates suggest the former is composed of both $z\gtrsim 5$ dusty star-
forming galaxies and $z\approx 1$–3 quiescent systems. The latter is composed
of more homogeneous Lyman break galaxies at $z\approx 6$–8. In both cases,
contamination by L- and T-type dwarfs cannot be ruled out with Euclid images
alone. Additional contamination from instrumental persistence is investigated
using a novel time series analysis. This work lays the foundation for future
searches within the Euclid Deep Fields, where thousands more $z\gtrsim 6$
Lyman break systems and extremely red sources will be identified.

###### Key Words.:

Galaxies: high-redshift; Galaxies: evolution; Catalogues

##  1 Introduction

The reionisation of neutral hydrogen within the intergalactic medium (IGM)
marks a major transition in cosmic history. Ionising Lyman continuum photons
emitted from the first generations of massive stars is thought to have
contributed significantly to the reionization budget (Dayal & Ferrara 2018;
Finkelstein et al. 2019; Atek et al. 2024b). Observations from Planck find
$z=7.67\pm 0.73$ as the mid-point of the reionization era, concluding sometime
around $z\approx 6$ with a transparent IGM (Planck Collaboration et al. 2016).
Within the standard paradigm of hierarchical structure formation, the first
structures collapse within the most overdense regions of the primordial web of
dark matter (White & Frenk 1991; Behroozi et al. 2019), from which the first
stars form. As such, the topology of reionisation should be patchy, varying
significantly over degree scales (Trac et al. 2015; Neyer et al. 2023; Lu et
al. 2024). Galaxies born out of these overdensities are expected to be rapidly
star-forming and therefore UV luminous, but correspondingly rare (Kauffmann et
al. 2022; Naidu et al. 2022b). Elsewhere, collections of less UV luminous
systems formed in comparably greater numbers (Bouwens et al. 2015; Finkelstein
et al. 2015; Qin et al. 2019; Kauffmann et al. 2022; Bouwens et al. 2023;
Leung et al. 2023; Adams et al. 2024; Donnan et al. 2024). Recent advancements
enabled by the James Webb Space Telescope (JWST) suggest that while the total
ionising flux of UV luminous galaxies is higher, the escape fraction of
ionising photons and therefore relative ionising contribution may be
subdominant (Roberts-Borsani et al. 2023; Endsley et al. 2023; Atek et al.
2024b). Furthermore, the discovery of surprisingly massive active black holes
at $z\approx 6$–10 has re-ignited the possibility of a quasar contribution to
reionisation (Bañados et al. 2018; Furtak et al. 2023; Juodžbalis et al. 2023;
Kokorev et al. 2023; Dayal et al. 2024; Greene et al. 2024).

Owing to their apparent magnitudes $J\approx 24$–26 AB and observational
accessibility from near-infrared (NIR) surveys, UV luminous galaxies ($M_{\rm
UV}\lesssim-21$ AB) from the reionization era ($z>6$) have been detected from
the few degree-scale NIR surveys wide enough to find them, e.g., SXDF and
COSMOS (Bowler et al. 2014; Kauffmann et al. 2022; Donnan et al. 2023;
Varadaraj et al. 2023). Pre-JWST studies already hinted at a potential excess
of UV-luminous galaxies at $z=8$–10 compared to typically assumed Schechter
functional forms, and a seemingly slow evolution in the bright-end of the
galaxy UV luminosity function at these redshifts (Bowler et al. 2020). This
slow evolution in the number density of UV-bright galaxies is being confirmed
by the most recent observations of JWST at $z>10$ (e.g. Harikane et al. 2023;
Chemerynska et al. 2023; Adams et al. 2024). However, their scarce number
density on the sky makes it challenging to assemble large samples to
accurately determine the shape of bright end of the UV luminosity function,
which holds crucial information on the early assembly of galaxies. Neither the
Hubble Space Telescope (HST) nor JWST are capable of efficiently surveying
degree-scale areas, requiring continued investment in large (albeit lower
resolution) NIR surveys from space and the ground.

These UV luminous, rapidly star forming galaxies are expected to be some of
the fastest growing systems of their epoch. Although speculative in nature,
they are some of the most suitable candidates for being the progenitors of
massive galaxies at later epochs, possibly also of the first generation to
have ceased star-formation (Carnall et al. 2023; Glazebrook et al. 2023). If
so, then these rare systems are vital laboratories for examining galaxy
evolution at its most extreme. Constraining their mass build up and future
evolution requires star formation rates, stellar masses, star-formation
histories, and estimates of their gas resevoirs. Detailed spectroscopic
follow-up is only now beginning to reveal the extraordinary variation in their
physical properties (Endsley et al. 2022; Bowler et al. 2024; Algera et al.
2024; Schouws et al. 2023). Given this diversity, the limited samples
currently available from the few degree-scale deep NIR surveys are
insufficient to characterise them as a population. Progress as to their nature
and contribution to reionisation requires even larger NIR surveys.

Another major contribution from NIR surveys is the discovery of extremely red
sources (e.g., Wang et al. 2016; Franco et al. 2018; Wang et al. 2019; Zavala
et al. 2021). Presumably reddened by dust obscuration, far-infrared studies
have accomplished much by identifying the UV light reprocessed by obscuring
dust clouds. JWST too, in its first images, revealed a surprising abundance of
extremely red, dust-obscured disc galaxies (Nelson et al. 2023), which may
have significant contributions to the stellar mass and star-formation budgets
at $z>3$ (Gottumukkala et al. 2024; Wang et al. 2024; Williams et al. 2023).
However, quiescent galaxies with their characteristically old stellar
populations are a known but important interloper population (Barrufet et al.
2024). Both pose significant obstacles to identifying genuine high-redshift
galaxies (Naidu et al. 2022a; Zavala et al. 2023).

The European Space Agency (ESA) Euclid mission was launched in July 2023. A
medium-class probe, it was designed to survey the Universe to uncover details
as to the nature and evolution of dark matter and dark energy – two elusive
components of the $\Lambda$CDM cosmological model (Laureijs et al. 2011;
Euclid Collaboration: Mellier et al. 2024). Its two instruments are the
visible instrument (VIS, Euclid Collaboration: Cropper et al. 2024) with its
characteristic ultra-broad $I_{\scriptscriptstyle\rm E}$ passband ideally
suited for obtaining high-resolution optical imaging necessary for weak
lensing studies, and the Near-Infrared Spectrometer and Photometer (NISP,
Euclid Collaboration: Jahnke et al. 2024), providing a complement of lower-
resolution NIR data in the $Y_{\scriptscriptstyle\rm E}$,
$J_{\scriptscriptstyle\rm E}$, and $H_{\scriptscriptstyle\rm E}$ passbands
(Euclid Collaboration: Schirmer et al. 2022) to secure photometric redshifts
in addition to slitless grism spectroscopy. This unique combination of
instruments is key to achieving Euclid’s objectives, and goes hand-in-hand
with the multi-tiered survey strategy ranging from the Euclid Wide Survey
(EWS, Euclid Collaboration: Scaramella et al. 2022) over 14 000 deg2 to a 53
deg2 Euclid Deep Survey (EDS) of three primary fields: the Euclid Deep Field
North (EDF-North); the Euclid Deep Field South (EDF-South); and the Euclid
Deep Field Fornax (EDF-Fornax). Additional complements from well-studied
auxiliary fields, such as COSMOS and a self-calibration field within EDF-
North, along with grism observations, are purposely designed to improve key
measurements.

Six Early Release Observations (ERO) projects were chosen to highlight the
capability of Euclid to study a variety of astrophysical phenomena (Cuillandre
et al. 2024; Euclid Early Release Observations 2024). Among them, “Magnifying
Lens” (PI: H. Atek) takes aim at two massive galaxy clusters, Abell 2390 and
Abell 2764, with VIS/$I_{\scriptscriptstyle\rm E}$,
NISP/$Y_{\scriptscriptstyle\rm E},J_{\scriptscriptstyle\rm
E},H_{\scriptscriptstyle\rm E}$, as well as NISP grism observations (Atek et
al. 2024a). While the magnifying power of their deep gravitational potentials
helps to resolve galaxies immediately behind the cluster, the large
$0.75\,\deg^{2}$ area of each field enables an order-of-magnitude increase in
the number of detectable $z\gtrsim 6$ UV bright galaxies compared to small
area blank fields from HST and JWST (e.g., CANDELS, Duncan et al. 2014;
Bouwens et al. 2015; Finkelstein et al. 2015). This rich sample of high-
redshift systems can then be used to constrain the UV luminosity functions of
galaxies and quasars, the physics of which can be studied from detailed
spectroscopic follow up. These same observations can also be used to constrain
dark matter through weak lensing analyses, as well as the virial masses and
assembly history of the cluster galaxies themselves.

This work aims to showcase the ability of Euclid to identify rare NISP-only
objects (i.e., not detected in VIS/$I_{\scriptscriptstyle\rm E}$), such as
luminous high-redshift galaxies and extremely red sources, and is organised as
follows. Section 2 describes the observations, data reduction, and photometric
catalogue of Abell 2390 and Abell 2764. Section 3 presents the methodology
adopted to identify NISP-only objects. Section 4 presents the photometrically-
selected sample, its properties, sources of potential contamination, and
physical interpretation. Section 5 discusses the challenges encountered and a
prospectus for identifying such systems from the EDS and auxiliary fields.
These results are computed adopting a standard $\Lambda$CDM cosmology with
$H_{0}=70$ km s-1 Mpc-1, $\Omega_{\rm m}=0.3$ and $\Omega_{\Lambda}=0.7$
throughout. All magnitudes are expressed in the AB system (Oke 1974), for
which a flux $f_{\nu}$ in $\mu$Jy ($10^{-29}$ erg cm-2s-1Hz-1) corresponds to
an AB magnitude of $23.9-2.5\,\log_{10}(f_{\nu}/\mu{\rm Jy})$.

##  2 Data and photometric catalogue

###  2.1 Observations

The ERO “Magnifying Lens” project consists of intermediate-depth observations
of two known galaxy clusters, Abell 2390 and Abell 2764. While both are rich
systems with many lensed background sources, Abell 2390 ($z=0.228$, Sohn et
al. 2020) is better studied than Abell 2764 ($z=0.07$, Katgert et al. 1996).
See Atek et al. (2024a) for details of the field selection.

For each cluster, Euclid obtained three reference observing sequences (ROS,
see Fig. 8 of Euclid Collaboration: Scaramella et al. 2022) of 70.2 min which
include VIS/$I_{\scriptscriptstyle\rm E}$ and NISP/$Y_{\scriptscriptstyle\rm
E},J_{\scriptscriptstyle\rm E},H_{\scriptscriptstyle\rm E}$ imaging, adopting
a 3′$\times$3′ dither between each ROS to fill-in coverage between the 36
chips. Individual $I_{\scriptscriptstyle\rm E}$, $Y_{\scriptscriptstyle\rm
E}$, $J_{\scriptscriptstyle\rm E}$, and $H_{\scriptscriptstyle\rm E}$
exposures were stacked to produce four deep mosaics using SWarp (Bertin et al.
2002) at native $None$ pix-1 and $None$ pix-1 scales, respectively. A 64 pixel
mesh and 3$\times$ smoothing factor was adopted to model and subtract the
background light, which for VIS is more challenging given the bluer Galactic
cirrus foreground. Although other images produced through other approaches
were considered, this work adopts the “Compact-sources” images because they
are optimised for photometry of faint, compact objects. See Cuillandre et al.
(2024) for a complete description of the reduction procedure.

Each mosaic spans $0.75\,\deg^{2}$, making the $I_{\scriptscriptstyle\rm
E}=27.1$ AB (5$\sigma$ point source) VIS images some of the deepest at such
high-resolution covering degree-scales, comparable only to the largest HST
mosaic taken (ACS/F814W over 1.7 deg2 in COSMOS, Koekemoer et al. 2011).
Similarly, the $Y_{\scriptscriptstyle\rm E}$, $J_{\scriptscriptstyle\rm E}$,
and $H_{\scriptscriptstyle\rm E}\approx$24.5 AB (5$\sigma$ point source)
images are some of the deepest NIR imaging covering degree-scales, comparable
only to VIDEO (Jarvis et al. 2013) and the UltraVISTA survey of COSMOS
(McCracken et al. 2012). Although designed for identifying new strongly lensed
galaxies, their large contiguous areas beyond the cluster centres make them
well-suited for identifying high-redshift, rest-frame UV bright objects that
are too rare to be found consistently by smaller NIR surveys.

###  2.2 Photometric catalogue

Sources were detected in each field using Pythonic Source Extractor (SEP,
Bertin & Arnouts 1996; Barbary 2016) from a CHI_MEAN coadd of all three NISP
$Y_{\scriptscriptstyle\rm E}$, $J_{\scriptscriptstyle\rm E}$, and
$H_{\scriptscriptstyle\rm E}$ mosaics constructed using SWarp (Bertin et al.
2002). To achieve maximal completeness, SEP was configured to detect sources
whose pixels are significant above $1.5\,\sigma$ across at least three
contiguous pixels after smoothing with a $None$ (1.5 pixel) full-width-half-
maximum Gaussian kernel (see Euclid Collaboration: Zalesky et al. 2024 for
relevant discussion). Aggressive deblending is crucial to separating the
relatively low-resolution NISP-only sources from line-of-sight neighbours. As
such, SEP is configured to deblend with $2\times 10^{5}$ thresholds, requiring
a contrast of $10^{-5}$, tuned by visual inspection. Cleaning was not applied
as it is liable to remove real sources of interest. A total of $501\,994$
sources were recovered (98% have ${\rm S/N}>3$ in either
$Y_{\scriptscriptstyle\rm E}$, $J_{\scriptscriptstyle\rm E}$, or
$H_{\scriptscriptstyle\rm E}$) with approximately equal numbers in each 0.5
deg2 field: $252\,675$ in Abell 2390; and $249\,319$ in Abell 2764.

Photometry was measured at source positions in circular apertures with
diameters of 0$\aas@@fstack{\prime\prime}$1, 0$\aas@@fstack{\prime\prime}$2,
0$\aas@@fstack{\prime\prime}$3, 0$\aas@@fstack{\prime\prime}$6,
1$\aas@@fstack{\prime\prime}$0, 1$\aas@@fstack{\prime\prime}$2,
1$\aas@@fstack{\prime\prime}$5, and 2$.\\!\\!^{\prime\prime}$0\. Uncertainties
were measured similarly on the weight maps; their effective per-pixel error
distributions were verified to be consistent with the per-pixel noise
estimated directly from the science mosaics. Given the $None$ pix-1 scale of
NISP, aperture diameters below $None$ are generally only suitable for VIS
photometry.

Considering the difference in resolution and spatial sampling between VIS and
NISP, it would seem advantageous to convolve all of the images to the broadest
PSF, which is $H_{\scriptscriptstyle\rm E}$. However, this work exploits the
unique potential of using VIS solely as a “dropout” band where the colour
terms between $I_{\scriptscriptstyle\rm E}$ and $Y_{\scriptscriptstyle\rm E}$,
$J_{\scriptscriptstyle\rm E}$, and $H_{\scriptscriptstyle\rm E}$ are largely
inconsequential relative to the much more important signal-to-noise ratio
(S/N) estimate from VIS/$I_{\scriptscriptstyle\rm E}$ which would be severely
degraded if the image were downsampled and smoothed. Instead, the
VIS/$I_{\scriptscriptstyle\rm E}$ S/N can be optimally determined from the
original high-resolution images using a suitably chosen aperture that is large
enough to be robust to noise but not corrupted by neighbouring sources. This
fact, together with the relatively similar PSFs between all three NISP bands
and the expected compactness of high-redshift Lyman break galaxies (¡1″in
radius, e.g., Bowler et al. 2017) means that we can expect to produce high-
fidelity NISP colours by simply assuming that any light outside the aperture
of choice is explained by the PSF.

All aperture flux estimates and their uncertainties are corrected to total
flux by dividing by the fractional energy outside each aperture. This extended
light distribution is measured from observed PSFs constructed by optimally
stacking recentred cutouts of point sources identified from the science
mosaics following Weaver et al. (2024). Relevant multiplicative correction
factors for VIS are 16$\times$, 3$\times$, and 2$\times$ for $None$, $None$,
and $None$ diameters, respectively; and 1.2$\times$, 1.3$\times$, and for NISP
are 1.4$\times$ for $None$ diameter apertures in $Y_{\scriptscriptstyle\rm
E}$, $J_{\scriptscriptstyle\rm E}$, and $H_{\scriptscriptstyle\rm E}$,
respectively.

To facilitate community engagement with these ERO data, a combined photometric
catalogue of all $501\,994$ sources is released with this work, jointly with
the overview paper of Atek et al. (2024a). The catalogue includes unique
source identification numbers and field-specific identifiers, sky coordinates,
elementary shape estimates, aperture and total fluxes, flux errors, and their
aperture-to-total corrections, in addition to Source Extractor-like flags.
Photometry is provided already corrected for Galactic extinction mapped by
Schlafly & Finkbeiner (2011), adopting the extinction curves of Fitzpatrick &
Massa (2007). There is a large number of artefacts near the mosaic edges where
only a single dither contributes, as well as along the diffraction spikes of
bright stars; these sources are identified in a hand-built region mask that
excludes 15% of the total catalogue (use_phot = 0) near bright stars,
diffraction spikes, and approximately 1′ around the mosaic edge. For the
complete details, consult the README document provided with the catalogue at
https://zenodo.org/doi/10.5281/zenodo.11151975.

##  3 Candidate identification

Rather than only identifying galaxies at $z\approx 6$–8, this work aims to
identify all systems that are found only in the NISP $Y_{\scriptscriptstyle\rm
E}$, $J_{\scriptscriptstyle\rm E}$, and $H_{\scriptscriptstyle\rm E}$ bands,
lacking any detectable VIS $I_{\scriptscriptstyle\rm E}$ signal. As such, a
selection function is adopted requiring a ${\rm S/N}<1.5$ for
VIS/$I_{\scriptscriptstyle\rm E}$ ($\approx 28.5$ total) in each of
0$\aas@@fstack{\prime\prime}$1, 0$\aas@@fstack{\prime\prime}$2, and
0$\aas@@fstack{\prime\prime}$3 diameter apertures. While this unusually strict
criterion can reject some real $z\approx 6$–7 sources with non-negligible
ionising UV continuum flux blueward of Ly$\alpha$, it is necessary in order to
maximise reliability (future ancillary optical data will help to relax this).
Furthermore, sources are required to have $J_{\scriptscriptstyle\rm E}$ and
$H_{\scriptscriptstyle\rm E}<25$ (${\rm S/N}\gtrsim 5$) and
$Y_{\scriptscriptstyle\rm E}<25.5$ (${\rm S/N}\gtrsim 3$), all total
magnitudes, relaxing the latter condition to allow for $z\approx 8$ solutions
where the Lyman break is only marginally observed, but limits the search to
$z\lesssim 8.5$. However, the criteria demand that even the fainest candidates
have an extraordinarily strong break with $I_{\scriptscriptstyle\rm
E}-Y_{\scriptscriptstyle\rm E}>2$ AB, greater than most Lyman-break selection
criteria used in HST and JWST surveys (e.g., Bouwens et al. 2015; Finkelstein
et al. 2015; Atek et al. 2024b; Adams et al. 2024), making these candidates
unusually secure. Figure 1 illustrates these criteria relative to an $M_{\rm
UV}=-22$ LBG at $z=7$, 8, and 9 built from Python-FSPS (Conroy et al. 2009;
Conroy & Gunn 2010; Johnson et al. 2023); this is a simple toy model assuming
a maximally opaque foreground IGM, high Ly$\alpha$ escape, and no damping
wing. The height of each transmission curve is set to the effective depth of
this selection function.

Figure 1: Summary of Euclid’s ability to identify bright $M_{\rm UV}<-22$ LBGs
detectable only in NISP (or VIS/$I_{\scriptscriptstyle\rm E}$ “dropout”) from
the ERO data of Abell 2764 and Abell 2390. Model spectra of an LBG at $z=7$,
8, and 9 are generated with python-FSPS. Euclid $I_{\scriptscriptstyle\rm E}$,
$Y_{\scriptscriptstyle\rm E}$, $J_{\scriptscriptstyle\rm E}$, and
$H_{\scriptscriptstyle\rm E}$ transmission curves are normalised such that
their peak coincides with the selection function adopted in this work.

For NISP, larger $None$ diameter apertures are chosen because they will
enclose marginally resolved features expected of $z\approx 6$–9 LBGs (e.g.,
Bowler et al. 2017). All colours are computed using the total fluxes because
they produce less biased colours compared to aperture fluxes alone. To
safeguard against artefacts near edges and diffraction spikes, sources in the
masked regions are discounted. Furthermore, extremely extended sources
unlikely to be high redshift are rejected by requiring that
$H_{\scriptscriptstyle\rm E}$ fluxes in $None$ apertures contain less than 20%
more light than is contained in $None$ diameter apertures. Of the total 262
sources satisfying these criteria, a visual inspection identified 66 likely
artefacts and 27 VIS detections arising from occasional unmasked anomalies in
the mosaics, e.g., diffraction spikes, cosmic rays, and low exposure areas.

Figure 2: Selection and properties of 168 NISP-only sources in Abell 2390 and
Abell 2764. Sources are divided into Lyman-break galaxy (LBG) candidates and
extremely red sources (ERSs). Panel A: $I_{\scriptscriptstyle\rm
E}-Y_{\scriptscriptstyle\rm E}$ versus $J_{\scriptscriptstyle\rm
E}-H_{\scriptscriptstyle\rm E}$ colour-colour diagram highlighting the
significance of the VIS non-detection ($1.5\sigma$ lower limits) and general
colours of the sources. Panel B: $Y_{\scriptscriptstyle\rm
E}-J_{\scriptscriptstyle\rm E}$ versus $J_{\scriptscriptstyle\rm
E}-H_{\scriptscriptstyle\rm E}$ colour-colour diagram separating the two
samples. Also shown is a reddening vector as well as tracks of $z=6$–9 LBGs
with different mean stellar ages (grey) and of $z=1$–3 maximally old quiescent
galaxies (maroon). Colours of observed M-, L-, and T-type dwarf stars are
measured from the SpeX Prism Library (Burgasser et al. 2004). Typical colour
uncertainties are shown in the upper two panels, where all
$I_{\scriptscriptstyle\rm E}-Y_{\scriptscriptstyle\rm E}$ colors are lower
limits.  Figure 3: $H_{\scriptscriptstyle\rm E}$ brightness versus compactness
estimated from a flux ratio in $None$ to $None$ apertures. Selected sources
are required to be relatively compact with an aperture ratio below 1.2. The
$H_{\scriptscriptstyle\rm E}$ compactness of genuine point sources identified
in $I_{\scriptscriptstyle\rm E}$ from the parent catalogue is shown by the
grey 2D histogram. Sources below a ratio of 1.0 are visually confirmed to have
significantly negative pixels nearby.

Figure 2 and Fig. 3 illustrate the colours and compactness of the 168
remaining candidates. Interestingly, despite overall similar detections in
each field, 109 sources are found in Abell 2390 and only 59 in Abell 2764, a
ratio of about 2 to 1. Reasons for this are likely related to brown dwarfs
from the Galaxy, since the two fields have very different Galactic latitudes
(see Sect. 5).

##  4 Results

The 168 sources selected in this work represent the most robust NISP-only
objects chosen from Abell 2390 and Abell 2764. It is neither a complete sample
nor a pure one, but is intended to showcase the potential of Euclid and its