<i>Euclid</i> preparation
J.-B. MelinUniversité Paris-SaclayS. A. StanfordA. WidmerUniversité Paris CitéP. TarríoObservatorio Astronómico Nacional, IGNJ. G. BartlettCNRS-UCB International Research Laboratory, Centre Pierre Binétruy, IRL2007, CPB-IN2P3T. SadibekovaCommissariat à l'Énergie Atomique et aux Énergies AlternativesG. W. PrattUniversité Paris-Saclay, Université Paris Cité, CEA, CNRS, AIMM. ArnaudIRFU, CEA, Université Paris-SaclayF. PacaudUniversität Bonn, Argelander-Institut für AstronomieT. H. ReiprichUniversität Bonn, Argelander-Institut für AstronomieA. BivianoINAF-Osservatorio Astronomico di TriesteS. BardelliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaS. BorganiICSC – Centro Nazionale di Ricerca in High Performance Computing, Big Data e Quantum ComputingP.-S. CorasanitiInstitut d’Astrophysique de Paris, UMR 7095, CNRS, and Sorbonne UniversitéS. EttoriINFN-BolognaA. FinoguenovZ. GhaffariINAF-Osservatorio Astronomico di TriesteP. A. GilesDepartment of Physics & Astronomy, University of SussexM. GirardiINAF-Osservatorio Astronomico di TriesteJ. B. Golden-MarxSchool of Physics and Astronomy, University of Nottingham, University ParkA. H. GonzalezDepartment of Astronomy, University of Florida, Bryant Space Science CenterM. KleinUniversity Observatory, LMU Faculty of PhysicsG. F. LesciDipartimento di Fisica e Astronomia “Augusto Righi” – Alma Mater Studiorum Università di BolognaM. MaturiZentrum für Astronomie, Universität HeidelbergB. J. MaughanBristol Robotics LaboratoryL. MoscardiniINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaM. PierreCEA Paris-SaclayM. RadovichINAF-Osservatorio Astronomico di PadovaP. RosatiINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaJ. G. SorceUniversité Paris-Saclay, CNRS, Institut d’astrophysique spatialeE. TsapraziAstrophysics Group, Blackett Laboratory, Imperial College LondonB. AltieriESAC/ESAA.W. AmaraSchool of Mathematics and Physics, University of SurreyS. AndreonINAF-Osservatorio Astronomico di BreraN. AuricchioINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaC. BaccigalupiSISSA, International School for Advanced StudiesMarco BaldiDipartimento di Fisica e Astronomia, Università di BolognaE. BranchiniDipartimento di Fisica, Università di GenovaM. BresciaDepartment of Physics “E. Pancini”, University Federico IIS. CameraINAF-Osservatorio Astrofisico di TorinoG. Cañas-HerreraLeiden Observatory, Leiden UniversityV. CapobiancoINAF-Osservatorio Astrofisico di TorinoC. CarboneINAF-IASF MilanoJ. CarreteroCentro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT)M. CastellanoNational Institute for AstrophysicsG. CastignaniINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaS. CavuotiNaples Anesthesia & Physician AssociatesK. 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 CanariasG. CongedoInstitute for Astronomy, University of Edinburgh, Royal ObservatoryChristopher J. ConseliceJodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, University of ManchesterL. ConversiEuropean Space Research InstituteY. CopinUniversité Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, UMR 5822F. CourbinInstitut de Ciències del Cosmos (ICCUB), Universitat de Barcelona (IEEC-UB)H. M. CourtoisUCB Lyon 1, CNRS/IN2P3, IUF, IP2I LyonA. Da SilvaInstituto de Astrofísica e Ciências do Espaço, Faculdade de Ciências, Universidade de LisboaH. DegaudenziDepartment of Astronomy, University of GenevaG. De LuciaINAF-Osservatorio Astronomico di TriesteH. DoleUniversité Paris-SaclayM. DouspisUniversité Paris-SaclayF. DubathDepartment of Astronomy, University of GenevaC. A. J. DuncanUniversity of EdinburghX. DupacESAC/ESAS. DusiniINFN-PadovaS. EscoffierCentre de physique des particules de MarseilleM. FabriciusMax Planck Institute for Extraterrestrial PhysicsM. FarinaINAF-Istituto di Astrofisica e Planetologia SpazialiS. FarrensCEA Paris-SaclayF. FaustiniNational Institute for AstrophysicsS. FerriolCentre National de la Recherche ScientifiqueF. FinelliINFN-BolognaP. FosalbaInstitute of Space Sciences (ICE, CSIC), Campus UABM. FrailisINAF-Osservatorio Astronomico di TriesteE. FranceschiINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaM. FumanaINAF-IASF MilanoS. GaleottaINAF-Osservatorio Astronomico di TriesteK. GeorgeUniversitäts-Sternwarte München, Fakultät für Physik, Ludwig-Maximilians-Universität MünchenB. GillisInstitute for Astronomy, University of Edinburgh, Royal ObservatoryC. GiocoliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaJ. Gracia-CarpioMax Planck Institute for Extraterrestrial PhysicsA. GrazianINAF-Osservatorio Astronomico di PadovaF. GruppMax Planck Institute for Extraterrestrial PhysicsS. V. H. HauganInstitute of Theoretical Astrophysics, University of OsloW. HolmesJet Propulsion Laboratory, California Institute of TechnologyF. HormuthFelix Hormuth EngineeringA. HornstrupCosmic Dawn Center (DAWN)K. JahnkeMax-Planck-Institut für AstronomieM. JhabvalaNASA Goddard Space Flight CenterE. KeihänenS. KermicheAix-Marseille Université, CNRS/IN2P3, CPPMA. KiesslingJet Propulsion Laboratory, California Institute of TechnologyM. KilbingerUniversité Paris CitéB. KubikCentre National de la Recherche ScientifiqueM KümmelUniversitäts-Sternwarte München, Fakultät für Physik, Ludwig-Maximilians-Universität MünchenM. KunzLaboratoire de Physique ThéoriqueH. Kurki‐SuonioDepartment of PhysicsA. M. C. Le BrunLaboratoire d’etude de l’Univers et des phenomenes eXtremes, Observatoire de Paris, Université PSL, Sorbonne Université, CNRSS. LigoriINAF-Osservatorio Astrofisico di TorinoP. B. LiljeInstitute of Theoretical Astrophysics, University of Oslo
2026
ABI
Abstract
We present our methodology for identifying known clusters as counterparts to objects in the Euclid Catalogue of Galaxy Clusters (ECGC). Euclid is expected to detect a large number of optically selected galaxy clusters over the approximately 14 000 square degrees of its extragalactic sky survey. Extending out well beyond redshift unity, the catalogue will contain many new high-redshift clusters, while at lower redshifts a fraction of the clusters will have been observed in other surveys. Identifying these known clusters as counterparts to the Euclid -detected clusters is an important step in the validation and construction of the ECGC to augment information with external observables. We present a set of catalogues and meta-catalogues of known clusters that we have assembled for this step, and we illustrate their application and our methodology using the Dark Energy Survey Year 1 RedMaPPer cluster catalogue in lieu of the future ECGC. In the process of this work, we have constructed and delivered an updated EC-RedMaPPer catalogue with multi-wavelength counterparts.
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