Accès ouvert déclaré
2026
preprint
Euclid. A two-point correlation approach to diagnosing star-related systematics in the Euclid spectroscopic survey
Euclid Collaboration, I. Risso, B. R. Granett, E. Branchini, A. Veropalumbo, B. Kubik, P. Monaco, J. Comparat, A. Hall, N. Aghanim, B. Altieri, A. Amara, S. Andreon, N. Auricchio, C. Baccigalupi, M. Baldi, A. Balestra, S. Bardelli, P. Battaglia, A. Biviano, M. Bolzonella, M. Brescia, S. Camera, G. Cañas-Herrera, V. Capobianco, C. Carbone, J. Carretero, F. J. Castander, M. Castellano, G. Castignani, S. Cavuoti, A. Cimatti, C. Colodro-Conde, G. Congedo, L. Conversi, Y. Copin, F. Courbin, H. M. Courtois, H. Degaudenzi, S. de la Torre, G. De Lucia, H. Dole, F. Dubath, X. Dupac, S. Dusini, S. Escoffier, M. Farina, R. Farinelli, S. Ferriol, F. Finelli, N. Fourmanoit, M. Frailis, E. Franceschi, M. Fumana, L. Gabarra, S. Galeotta, K. George, W. Gillard, B. Gillis, C. Giocoli, J. Gracia-Carpio, A. Grazian, F. Grupp, L. Guzzo, S. V. H. Haugan, S. Hemmati, W. Holmes, F. Hormuth, A. Hornstrup, K. Jahnke, M. Jhabvala, B. Joachimi, S. Kermiche, A. Kiessling, M. Kümmel, M. Kunz, H. Kurki-Suonio, A. M. C. Le Brun, S. Ligori, P. B. Lilje, V. Lindholm, I. Lloro, M. Magliocchetti, G. Mainetti, O. Mansutti, O. Marggraf, M. Martinelli, N. Martinet, F. Marulli, R. J. Massey, N. Mauri, E. Medinaceli, M. Melchior, M. Meneghetti, E. Merlin, G. Meylan, A. Mora, M. Moresco, C. Moretti, L. Moscardini, R. Nakajima, C. Neissner, S. -M. Niemi, J. W. Nightingale, C. Padilla, S. Paltani, F. Pasian, W. J. Percival, V. Pettorino, A. Pezzotta, S. Pires, G. Polenta, M. Poncet, L. A. Popa, F. Raison, A. Renzi, J. Rhodes, G. Riccio, F. Rizzo, E. Romelli, M. Roncarelli, B. Rusholme, R. Saglia, Z. Sakr, A. G. Sánchez, D. Sapone, B. Sartoris, P. Schneider, T. Schrabback, M. Scodeggio, A. Secroun, E. Sihvola, C. Sirignano, G. Sirri, L. Stanco, P. Tallada-Crespí, A. N. Taylor, I. Tereno, N. Tessore, S. Toft, R. Toledo-Moreo, F. Torradeflot, I. Tutusaus, J. Valiviita, T. Vassallo, Y. Wang, J. Weller, G. Zamorani, F. M. Zerbi, E. Zucca, M. Ballardini, E. Bozzo, C. Burigana, R. Cabanac, M. Calabrese, A. Cappi, F. Caro, T. Castro, J. A. Escartin Vigo, J. García-Bellido, T. Gasparetto, J. Macias-Perez, R. Maoli, R. B. Metcalf, A. A. Nucita, M. Pöntinen, E. Sarpa, V. Scottez, M. Sereno, M. Tenti, M. Tucci, M. Viel, M. Wiesmann, J. A. Acevedo Barroso, Y. Akrami, I. T. Andika, S. Anselmi, M. Archidiacono, G. Aricò, F. Atrio-Barandela, M. Baes, L. Bazzanini, J. Bel, D. Bertacca, M. Bethermin, F. Beutler, L. Blot, M. Bonici, M. L. Brown, S. Bruton, B. Camacho Quevedo, P. Carrilho, C. S. Carvalho, F. Cogato, T. E. Collett, S. Conseil, S. Contarini, A. R. Cooray, P. Corcho-Caballero, B. Csizi, O. Cucciati, S. Davini, T. de Boer, F. De Paolis, G. Desprez, A. Díaz-Sánchez, S. Di Domizio, J. M. Diego, V. Duret, A. Enia, Y. Fang, A. Farina, A. Finoguenov, A. Franco, Y. Fu, K. Ganga, E. Gaztanaga, Z. Ghaffari, F. Giacomini, F. Gianotti, G. Gozaliasl, A. Gruppuso, M. Guidi, C. M. Gutierrez, H. Hildebrandt, J. Hjorth, M. Jauzac, J. J. E. Kajava, Y. Kang, V. Kansal, D. Karagiannis, J. Kim, C. C. Kirkpatrick, A. Kovács, I. Kovačić, K. Koyama, S. Kruk, M. C. Lam, F. Leclercq, L. Legrand, M. Lembo, G. Leroy, G. F. Lesci, J. Lesgourgues, T. I. Liaudat, L. Linke, S. J. Liu, F. Mannucci, F. R. Marleau, C. J. A. P. Martins, M. Miluzio, G. Morgante, S. Nadathur, K. Naidoo, A. Navarro-Alsina, S. Nesseris, L. Nicastro, F. Oppizzi, F. Pace, D. Paoletti, G. Parimbelli, F. Passalacqua, K. Paterson, L. Patrizii, C. Pattison, R. Paviot, A. Pisani, D. Potter, G. W. Pratt, S. Quai, M. Radovich, G. Rodighiero, W. Roster, S. Sacquegna, M. Sahlén, D. B. Sanders, A. Schneider, D. Sciotti, E. Sellentin, S. Serjeant, L. C. Smith, J. G. Sorce, I. Szapudi, M. Talia, K. Tanidis, C. Tao, F. Tarsitano, G. Testera, R. Teyssier, S. Tosi, A. Troja, C. Uhlemann, C. Valieri, A. Venhola, D. Vergani, G. Verza, S. Vinciguerra, M. von Wietersheim-Kramsta, N. A. Walton, L. Wang, A. H. Wright
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163Institutions déclarées
28Pays d’affiliation déclarés
Résumé fourni par la source
The Euclid spectroscopic survey will measure galaxy clustering with unprecedented precision, requiring stringent control of observational and instrumental systematics. Star-related effects may contaminate spectroscopic images through photometric persistence and imperfect masking of stars. We characterized their impact on galaxy clustering analyses, focusing on angular features identifiable in the data. We used angular and spatial auto- and cross-correlation statistics. For galaxies, we used mock spectroscopic catalogues from the EuclidLargeMocks in a 330 deg2 region of the Euclid Wide Survey (EWS). For stars, we used Gaia and 2MASS catalogues in the same area. To simulate photometric persistence, we implemented a simplified detector-level model calibrated on spectroscopic measurements and varied its strength to introduce different interloper fractions. For stellar masking, we modelled inconsistencies between the mask applied to the data and to the random catalogue. We measured star-star, galaxy-galaxy, and star-galaxy angular correlation functions using the Landy--Szalay estimator, and quantified deviations from the expected null star-galaxy correlation. We also evaluated the large-scale impact of such systematics through the three-dimensional two-point correlation function (2PCF). Photometric persistence produces a characteristic feature in the star-galaxy angular cross-correlation at scales of order 100", corresponding to the Euclid dithering pattern and grism dispersion geometry, and a spurious positive signal approximately constant up to 1°. Star-galaxy cross-correlation can detect residual persistence at contamination levels as low as 10% in a Data Release 1 spectroscopic catalogue. In contrast, stellar-mask mismatches produce strong small-scale angular signatures but have negligible impact on the large-scale 2PCF under realistic EWS conditions.
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Institutions déclarées
Brera Astronomical ObservatoryIstituto Nazionale di Fisica Nucleare, Sezione di GenovaUniversity of GenoaLyon 1 UniversitéCentre National de la Recherche ScientifiqueInstitut National de Physique Nucléaire et de Physique des ParticulesInstitut de Physique des 2 Infinis de LyonUniversity of TriesteTrieste Astronomical ObservatoryIstituto Nazionale di Fisica Nucleare, Sezione di TriesteInstitute for Fundamental Physics of the UniverseInstitut polytechnique de GrenobleUniversité Grenoble AlpesRoyal ObservatoryUniversity of EdinburghUniversité Paris-SaclayInstitut d'Astrophysique SpatialeEuropean Space Astronomy CentreUniversity of SurreyOsservatorio di Astrofisica e Scienza dello SpazioScuola Internazionale Superiore di Studi AvanzatiIstituto Nazionale di Fisica Nucleare, Sezione di BolognaUniversity of BolognaOsservatorio Astronomico di PadovaAstronomical Observatory of CapodimonteIstituto Nazionale di Fisica Nucleare, Sezione di TorinoOsservatorio Astrofisico di TorinoUniversity of TurinLeiden UniversityNational Institute for AstrophysicsPort d'Informació CientíficaCentro de Investigaciones Energéticas, Medioambientales y TecnológicasInstitute of Space SciencesInstitut d'Estudis Espacials de CatalunyaInstitute of Space Science - INFLPR SubsidiaryAstronomical Observatory of RomeIstituto Nazionale di Fisica Nucleare, Sezione di NapoliInstituto de Astrofísica de CanariasEuropean Space Research InstituteInstitució Catalana de Recerca i Estudis AvançatsInstitut Català de Ciències del ClimaInstitut de Ciències del CosmosUniversity of GenevaAix-Marseille UniversitéIstituto Nazionale di Fisica Nucleare, Sezione di PadovaCentre de physique des particules de MarseilleInstitute for Space Astrophysics and PlanetologyUniversity of OxfordLMU KlinikumLudwig-Maximilians-Universität MünchenMax Planck Institute for Extraterrestrial PhysicsUniversity of MilanIstituto Nazionale di Fisica Nucleare, Sezione di MilanoUniversity of OsloCalifornia Institute of TechnologyInfrared Processing and Analysis CenterJet Propulsion LaboratoryUniversité Bourgogne Franche-ComtéDAWN Center for Independent LivingTechnical University of DenmarkMax Planck Institute for AstronomyGoddard Space Flight CenterUniversity College LondonUniversity of HelsinkiHelsinki Institute of PhysicsSorbonne UniversitéLaboratoire Univers et ThéoriesSKA ObservatoryCentre de Calcul de l’Institut National de Physique Nucléaire et de Physique des ParticulesUniversity of BonnIstituto Nazionale di Fisica Nucleare, Sezione di Roma IDurham UniversityFHNW University of Applied Sciences and Arts Northwestern SwitzerlandÉcole Polytechnique Fédérale de LausanneEuropean Space AgencyInstitute for High Energy PhysicsEuropean Space Research and Technology CentreNewcastle UniversityUniversity of WaterlooPerimeter InstituteUniversité Paris CitéCommissariat à l'Énergie Atomique et aux Énergies AlternativesAstrophysique, Instrumentation et ModélisationCEA Paris-SaclayAgenzia Spaziale ItalianaCentre National d'Études SpatialesUniversity of PaduaConsejo Superior de Investigaciones CientíficasSaint Joseph UniversityInstitut de Recherche en Astrophysique et PlanétologieUniversidad Autónoma de MadridUniversity of ChileUniversität InnsbruckUniversity of LisbonInstitute of Astrophysics and Space SciencesUniversity of CopenhagenEuropean UnionUniversidad Politécnica de CartagenaUniversity of FerraraIstituto Nazionale di Fisica Nucleare, Sezione di FerraraIstituto di Radioastronomia di BolognaOsservatorio Astronomico della Regione Autonoma Valle d'AostaAstronomical ObservatoryUniversité Côte d'AzurObservatoire de la Côte d’AzurInstitute of Physics of the Slovak Academy of SciencesSapienza University of RomeUniversity of SalentoIstituto Nazionale di Fisica Nucleare, Sezione di LecceUniversité Catholique de LilleInstitut d'Astrophysique de ParisInstitute for High Performance Computing and NetworkingCase Western Reserve UniversityUniversité Paris Sciences et LettresUniversidad de SalamancaGhent UniversityUniversité de ToulonObservatoire astronomique de StrasbourgUniversité de StrasbourgKavli Institute for the Physics and Mathematics of the UniverseUniversity of ManchesterUniversity of HertfordshireUniversity of PortsmouthUniversity of California, IrvineUniversity of GroningenUniversity of Hawaii SystemInstituto de Física de CantabriaAalto UniversityUniversidad de La LagunaAstronomical Institute of the Slovak Academy of SciencesRuhr University BochumUniversity of KwaZulu-NatalUniversity of TurkuTurku Centre for Computer ScienceSerco (United Kingdom)ARC Centre of Excellence for Dark Matter Particle PhysicsSwinburne University of TechnologyUniversity of the Western CapeKonkoly ObservatoryBrazilian Center for Research in Energy and MaterialsInstitut de Recherche sur les Lois Fondamentales de l'UniversArcetri Astrophysical ObservatoryUniversidade do PortoCentro de Astrofísica da Universidade do PortoUniversity of ZurichCollurania Teramo ObservatoryUppsala UniversityThe Open UniversityUniversity of CambridgeUniversité de LilleCentre de Recherche en Informatique, Signal et Automatique de LilleÉcole Centrale de LilleUniversity of Nova GoricaETH ZurichNagoya UniversityPrinceton UniversityBielefeld UniversityUniversity of OuluThe Abdus Salam International Centre for Theoretical Physics (ICTP)International Centre for Theoretical SciencesFlatiron Health (United States)Flatiron InstituteSpace Research Organisation Netherlands Une affiliation ne permet pas de déduire la nationalité d’un auteur.
Sujets associés
Galaxies: Formation, Evolution, PhenomenaAstronomy and Astrophysical ResearchStellar, planetary, and galactic studies