Mostrar el registro sencillo del ítem

Gaia Data Release 1. Reference frame and optical properties of ICRF sources

hal.structure.identifierJoseph Louis LAGRANGE [LAGRANGE]
dc.contributor.authorMIGNARD, F.,
dc.contributor.authorKLIONER, S.,
dc.contributor.authorLINDEGREN, L.,
hal.structure.identifierZentrum für astronomie
dc.contributor.authorBASTIAN, U.,
hal.structure.identifierUniversité Grenoble Alpes - UFR Langage, lettres et arts du spectacle, information et communication - Dpt Lettres et arts du spectacle [UGA UFR LLASIC LAS]
dc.contributor.authorBOMBRUN, A.,
hal.structure.identifierSolvay (France)
dc.contributor.authorHERNANDEZ, J.,
dc.contributor.authorHOBBS, D.,
hal.structure.identifierAgence Spatiale Européenne = European Space Agency [ESA]
dc.contributor.authorLAMMERS, U.,
dc.contributor.authorMICHALIK, D.,
dc.contributor.authorRAMOS-LERATE, M.,
hal.structure.identifierDepartment of Clinical Medicine
hal.structure.identifierDepartment of nuclear medicine
dc.contributor.authorBIERMANN, M.,
dc.contributor.authorBUTKEVICH, A.,
dc.contributor.authorCOMORETTO, G.,
dc.contributor.authorJOLIET, E.,
hal.structure.identifierHeckscher-Klinikum
dc.contributor.authorHOLL, B.,
dc.contributor.authorHUTTON, A.,
dc.contributor.authorPARSONS, P.,
dc.contributor.authorSTEIDELMUELLER, H.,
hal.structure.identifierARHEOINVEST
dc.contributor.authorANDREI, A.,
hal.structure.identifierM2A 2016
dc.contributor.authorBOURDA, G.
hal.structure.identifierM2A 2016
dc.contributor.authorCHARLOT, P.
dc.date.issued2016-09
dc.identifier.issn0004-6361
dc.description.abstractEnAs part of the data processing for Gaia Data Release~1 (Gaia DR1) a special astrometric solution was computed, the so-called auxiliary quasar solution. This gives positions for selected extragalactic objects, including radio sources in the second realisation of the International Celestial Reference Frame (ICRF2) that have optical counterparts bright enough to be observed with Gaia. A subset of these positions was used to align the positional reference frame of Gaia DR1 with the ICRF2. We describe the properties of the Gaia auxiliary quasar solution for a subset of sources matched to ICRF2, and compare their optical and radio positions at the sub-mas level. Their formal standard errors are better than 0.76~milliarcsec (mas) for 50% of the sources and better than 3.35~mas for 90%. Optical magnitudes are obtained in Gaia's unfiltered photometric G band. The comparison with the radio positions of the defining sources shows no systematic differences larger than a few tenths of a mas. The fraction of questionable solutions, not readily accounted for by the statistics, is less than 6%. Normalised differences have extended tails requiring case-by-case investigations for around 100 sources, but we have not seen any difference indisputably linked to an optical-radio offset in the sources.
dc.language.isoen
dc.publisherEDP Sciences
dc.subject.enAstrophysics - Instrumentation and Methods for Astrophysics
dc.subject.enAstrophysics - Astrophysics of Galaxies
dc.title.enGaia Data Release 1. Reference frame and optical properties of ICRF sources
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/201629534
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Instrumentation et méthodes pour l'astrophysique [astro-ph.IM]
dc.identifier.arxiv1609.07255
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageid.A5
bordeaux.volume595
bordeaux.peerReviewedoui
hal.identifierhal-01372297
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01372297v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomy%20and%20Astrophysics%20-%20A&A&rft.date=2016-09&rft.volume=595&rft.spage=id.A5&rft.epage=id.A5&rft.eissn=0004-6361&rft.issn=0004-6361&rft.au=MIGNARD,%20F.,&KLIONER,%20S.,&LINDEGREN,%20L.,&BASTIAN,%20U.,&BOMBRUN,%20A.,&rft.genre=article


Archivos en el ítem

ArchivosTamañoFormatoVer

No hay archivos asociados a este ítem.

Este ítem aparece en la(s) siguiente(s) colección(ones)

Mostrar el registro sencillo del ítem