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Gaia Data Release 2. Catalogue validation

hal.structure.identifierGalaxies, Etoiles, Physique, Instrumentation [GEPI]
dc.contributor.authorARENOU, F.
hal.structure.identifierInstitut de Ciènces del Cosmos (ICC)
dc.contributor.authorLURI, X.
hal.structure.identifierGalaxies, Etoiles, Physique, Instrumentation [GEPI]
dc.contributor.authorBABUSIAUX, C.
hal.structure.identifierNelson Mandela University [Port Elizabeth]
dc.contributor.authorFABRICIUS, C.
hal.structure.identifierKapteyn Astronomical Institute [Groningen]
dc.contributor.authorHELMI, A.
dc.contributor.authorMURAVEVA, T.
hal.structure.identifierUnivers, Transport, Interfaces, Nanostructures, Atmosphère et environnement, Molécules (UMR 6213) [UTINAM]
dc.contributor.authorROBIN, A. C.
hal.structure.identifierInstitut de Mécanique Céleste et de Calcul des Ephémérides [IMCCE]
dc.contributor.authorSPOTO, F.
dc.contributor.authorVALLENARI, A.
dc.contributor.authorANTOJA, T.
dc.contributor.authorCANTAT-GAUDIN, T.
dc.contributor.authorJORDI, C.
hal.structure.identifierGalaxies, Etoiles, Physique, Instrumentation [GEPI]
dc.contributor.authorLECLERC, N.
hal.structure.identifierUnivers, Transport, Interfaces, Nanostructures, Atmosphère et environnement, Molécules (UMR 6213) [UTINAM]
dc.contributor.authorREYLÉ, C.
hal.structure.identifierLaboratoire d'Astrophysique de Marseille [LAM]
dc.contributor.authorROMERO-GOMEZ, M.
hal.structure.identifierGalaxies, Etoiles, Physique, Instrumentation [GEPI]
dc.contributor.authorSHIH, C.
dc.contributor.authorSORIA, S.
hal.structure.identifierSystèmes de Référence Temps Espace [SYRTE]
dc.contributor.authorBARACHE, C.
dc.contributor.authorBOSSINI, D.
dc.contributor.authorBRAGAGLIA, A.
dc.contributor.authorBREDDELS, A.
hal.structure.identifierScuola Internazionale Superiore di Studi Avanzati / International School for Advanced Studies [SISSA / ISAS]
dc.contributor.authorFABRIZIO, M.
hal.structure.identifierSystèmes de Référence Temps Espace [SYRTE]
dc.contributor.authorLAMBERT, S.
dc.contributor.authorM. MARRESE, P.
dc.contributor.authorMASSARI, D.
hal.structure.identifierSIM/IDL Faculdade de Ciências da Universidade de Lisboa [FCUL]
dc.contributor.authorMOITINHO, A.
hal.structure.identifierGalaxies, Etoiles, Physique, Instrumentation [GEPI]
dc.contributor.authorROBICHON, N.
hal.structure.identifierGalaxies, Etoiles, Physique, Instrumentation [GEPI]
dc.contributor.authorRUIZ-DERN, L.
dc.contributor.authorSORDO, R.
dc.contributor.authorVELJANOSKI, J.
hal.structure.identifierGeneva Observatory
dc.contributor.authorEYER, L.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorJASNIEWICZ, Gérard
hal.structure.identifierINAF - Osservatorio Astronomico di Bologna [OABO]
dc.contributor.authorPANCINO, E.
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorSOUBIRAN, C.
dc.contributor.authorSPAGNA, A.
hal.structure.identifierJoseph Louis LAGRANGE [LAGRANGE]
dc.contributor.authorTANGA, P.
hal.structure.identifierGalaxies, Etoiles, Physique, Instrumentation [GEPI]
dc.contributor.authorTURON, C.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorZURBACH, Claude
dc.date.issued2018-08
dc.identifier.issn0004-6361
dc.description.abstractEnContext. The second Gaia data release (DR2) contains very precise astrometric and photometric properties for more than one billion sources, astrophysical parameters for dozens of millions, radial velocities for millions, variability information for half a million stars from selected variability classes, and orbits for thousands of solar system objects. Aims: Before the catalogue was published, these data have undergone dedicated validation processes. The goal of this paper is to describe the validation results in terms of completeness, accuracy, and precision of the various Gaia DR2 data. Methods: The validation processes include a systematic analysis of the catalogue content to detect anomalies, either individual errors or statistical properties, using statistical analysis and comparisons to external data or to models. Results: Although the astrometric, photometric, and spectroscopic data are of unprecedented quality and quantity, it is shown that the data cannot be used without dedicated attention to the limitations described here, in the catalogue documentation and in accompanying papers. We place special emphasis on the caveats for the statistical use of the data in scientific exploitation. In particular, we discuss the quality filters and the consideration of the properties, systematics, and uncertainties from astrometry to astrophysical parameters, together with the various selection functions.
dc.language.isoen
dc.publisherEDP Sciences
dc.title.enGaia Data Release 2. Catalogue validation
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/201833234
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Instrumentation et méthodes pour l'astrophysique [astro-ph.IM]
dc.identifier.arxiv1804.09375
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageA17
bordeaux.volume616
bordeaux.peerReviewedoui
hal.identifierhal-01868112
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01868112v1
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