Euclid
K. PatersonMax-Planck-Institut für AstronomieM SchirmerMax-Planck-Institut für AstronomieM. SchirmerMax-Planck-Institut für AstronomieB. VenemansLeiden Observatory, Leiden UniversityK. JahnkęUniversité Paris-Saclay, CNRS, Institut d’astrophysique spatialeN. AghanimUniversité Paris-Saclay, CNRS, Institut d’astrophysique spatialeB. AltieriESAC/ESAA. AmaraSchool of Mathematics and Physics, University of SurreyS. AndreonINAF – Osservatorio Astronomico di BreraC. BaccigalupiINAF-Osservatorio Astronomico di TriesteMarco BaldiDipartimento di Fisica e Astronomia, Università di BolognaA. BalestraINAF – Osservatorio Astronomico di PadovaSandro BardelliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaS. BardelliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaP. BattagliaINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaPietro BattagliaINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaA. BivianoINAF-Osservatorio Astronomico di TriesteA. BonchiSpace Science Data Center, Italian Space AgencyE. BranchiniDipartimento di Fisica, Università di GenovaM. BresciaDepartment of Physics “E. Pancini”, University Federico IIMattia BresciaDepartment of Physics “E. Pancini”, University Federico IIJ. BrinchmannFaculdade de Ciências da Universidade do PortoStefano CameraDipartimento di Fisica, Università degli Studi di TorinoS CameraDipartimento di Fisica, Università degli Studi di TorinoG Cañas-HerreraEuropean Space Agency/ESTECGuadalupe Cañas-HerreraEuropean Space Agency/ESTECV. CapobiancoINAF-Osservatorio Astrofisico di TorinoJ. CarreteroPort d’Informació Científica, Campus UABSantiago CasasInstitute for Theoretical Particle Physics and Cosmology (TTK), RWTH Aachen UniversityMarco CastellanoINAF – Osservatorio Astronomico di RomaM CastellanoINAF – Osservatorio Astronomico di RomaG. CastignaniINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaGerman CastignaniINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaStefano CavuotiINAF-Osservatorio Astronomico di CapodimonteS CavuotiINAF-Osservatorio Astronomico di CapodimonteK. C. ChambersInstitute for Astronomy, University of HawaiiA. CimattiDipartimento di Fisica e Astronomia “Augusto Righi” – Alma Mater Studiorum Università di BolognaC. Colodro-CondeInstituto de Astrofísica de CanariasC Colodro-CondeInstituto de Astrofísica de CanariasG. CongedoInstitute for Astronomy, University of Edinburgh, Royal ObservatoryChristopher J. ConseliceJodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, University of ManchesterL ConversiESAC/ESALuca ConversiESAC/ESAYannick CopinUniversité Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, UMR 5822Y. CopinUniversité Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, UMR 5822F CourbinInstitució Catalana de Recerca i Estudis Avançats (ICREA)F. CourbinInstitut de Ciències del Cosmos (ICCUB), Universitat de Barcelona (IEEC-UB)H. M. CourtoisIP2I Lyon - Institut de Physique des 2 Infinis de Lyon (Campus LyonTech-la Doua
Bâtiment Paul DIRAC
4 Rue Enrico Fermi
69622 Villeurbanne Cedex - France)A. Da SilvaDepartamento de Física, Faculdade de Ciências, Universidade de LisboaR. da SilvaSpace Science Data Center, Italian Space AgencyHubert DegaudenziDepartment of Astronomy, University of GenevaH. DegaudenziDepartment of Astronomy, University of GenevaG. De LuciaINAF-Osservatorio Astronomico di TriesteA. M. Di GiorgioINAF – Istituto di Astrofisica e Planetologia SpazialiJ. DinisDepartamento de Física, Faculdade de Ciências, Universidade de LisboaH. DoleIAS - Institut d'astrophysique spatiale (Bâtiment 121 91405 ORSAY CEDEX - France)F. DubathDepartment of Astronomy, University of GenevaX. DupacESAC/ESAS. DusiniINFN – PadovaA. EaletIP2I Lyon - Institut de Physique des 2 Infinis de Lyon (Campus LyonTech-la Doua
Bâtiment Paul DIRAC
4 Rue Enrico Fermi
69622 Villeurbanne Cedex - France)Stephanie EscoffierAix-Marseille Université, CNRS/IN2P3, CPPMS. EscoffierAix-Marseille Université, CNRS/IN2P3, CPPMMarcelo FarinaINAF – Istituto di Astrofisica e Planetologia SpazialiR. FarinelliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaR FarinelliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaF. FaustiniINAF – Osservatorio Astronomico di RomaS. FerriolUniversité Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, UMR 5822Francesco FinelliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaF. Finelli⋆INAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaS. FotopoulouSchool of Physics, HH Wills Physics Laboratory, University of BristolN. FourmanoitAix-Marseille Université, CNRS/IN2P3, CPPMNicolas FourmanoitAix-Marseille Université, CNRS/IN2P3, CPPMM. FrailisINAF-Osservatorio Astronomico di TriesteE. FranceschiINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaP. FranzettiINAF – IASF MilanoS. GaleottaINAF-Osservatorio Astronomico di TriesteKoshy GeorgeUniversitäts-Sternwarte München, Fakultät für Physik, Ludwig-Maximilians-Universität MünchenK GeorgeUniversitäts-Sternwarte München, Fakultät für Physik, Ludwig-Maximilians-Universität MünchenW. GillardAix-Marseille Université, CNRS/IN2P3, CPPMB. GillisInstitute for Astronomy, University of Edinburgh, Royal ObservatoryC. GiocoliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaJ. Gracia-CarpioMax Planck Institute for Extraterrestrial PhysicsB. R. GranettINAF – Osservatorio Astronomico di BreraA. GrazianINAF – Osservatorio Astronomico di PadovaF. GruppUniversitäts-Sternwarte München, Fakultät für Physik, Ludwig-Maximilians-Universität MünchenL. GuzzoDipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di MilanoLuigi GuzzoDipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di MilanoS. V. H. HauganInstitute of Theoretical PhysicsHenk HoekstraLeiden Observatory, Leiden UniversityWarren HolmesJet Propulsion Laboratory, California Institute of TechnologyW. HolmesJet Propulsion Laboratory, California Institute of TechnologyF. HormuthFelix Hormuth EngineeringA. HornstrupCosmic Dawn Center (DAWN)P. HudelotInstitut d’Astrophysique de Paris, UMR 7095, CNRS, and Sorbonne UniversitéM. JhabvalaNASA Goddard Space Flight CenterE. KeihänenSmain KermicheAix-Marseille Université, CNRS/IN2P3, CPPMS. KermicheAix-Marseille Université, CNRS/IN2P3, CPPMA. KiesslingJet Propulsion Laboratory, California Institute of TechnologyR. KohleyESAC/ESAB. KubikInstitute of Nuclear Physics of LyonM KümmelUniversitäts-Sternwarte München, Fakultät für Physik, Ludwig-Maximilians-Universität MünchenM. KunzUniversité de Genève, Département de Physique Théorique and Centre for Astroparticle PhysicsMartin KunzUniversité de Genève, Département de Physique Théorique and Centre for Astroparticle PhysicsHannu Kurki-SuonioDepartment of PhysicsH. Kurki‐SuonioDepartment of PhysicsA. M. C. Le BrunLaboratoire détude de l’Univers et des phénoménes eXtrémes, Observatoire de Paris, Université PSL, Sorbonne Université, CNRSD. Le MignantLAM - Laboratoire d'Astrophysique de Marseille (Pôle de l'Étoile Site de Château-Gombert 38, rue Frédéric Joliot-Curie 13388 Marseille cedex 13 - France)S LigoriINAF-Osservatorio Astrofisico di TorinoSebastiano LigoriINAF-Osservatorio Astrofisico di TorinoP. B. LiljeInstitute of Theoretical Astrophysics, University of OsloV. LindholmDepartment of PhysicsI. LloroSKA Observatory, Jodrell Bank, Lower Withington, MacclesfieldG. MainettiCentre de Calcul de l’IN2P3/CNRSD. MainoINAF – IASF MilanoE. MaioranoINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaO. MansuttiINAF-Osservatorio Astronomico di TriesteS. MarcinUniversity of Applied Sciences and Arts of Northwestern Switzerland, School of EngineeringO. MarggrafUniversität Bonn, Argelander-Institut für AstronomieOle MarggrafUniversität Bonn, Argelander-Institut für AstronomieK. MarkovičJet Propulsion Laboratory, California Institute of TechnologyM. MartinelliINFN-Sezione di RomaNadine MartinetAix-Marseille Université, CNRS, CNES, LAMN. MartinetAix-Marseille Université, CNRS, CNES, LAMF. MarulliDipartimento di Fisica e Astronomia “Augusto Righi” – Alma Mater Studiorum Università di BolognaR MasseyR. Massey
ABI
Abstract
The Near-Infrared Spectrometer and Photometer (NISP) on board Euclid includes several optical elements in its path that introduce artefacts into the data from non-nominal light paths. To ensure uncontaminated source photometry, these artefacts must be accurately accounted for. This paper focuses on two specific optical features in NISP’s photometric data (NISP-P): ghosts caused by the telescope’s dichroic beamsplitter, and the bandpass filters within the NISP fore-optics. Both ghost types exhibit a characteristic morphology and are offset from the originating stars. The offsets are well modelled using 2D polynomials; only stars brighter than approximately 10 magnitudes in each filter produce significant ghost contributions. The masking radii for these ghosts depend on both the source-star brightness and the filter wavelength, ranging from 20 to 40 pixels. We present the final relations and models used in the near-infrared (NIR) processing function (PF) to mask these ghosts for Euclid ’s Quick Data Release (Q1).
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