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Division I / Commission 8 / Working Group Densification of the Optical Reference Frame

dc.contributor.authorZACHARIAS, Norbert
dc.contributor.authorPLATAIS, Imants
dc.contributor.authorF. VAN ALTENA, William
dc.contributor.authorBUCCIARELLI, Beatrice
dc.contributor.authorE. CORBIN, Thomas
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierInstituto de Astronomia, Geofísica e Ciências Atmosféricas [São Paulo] [IAG]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorDUCOURANT, C.
dc.contributor.authorWYN EVANS, Dafydd
dc.contributor.authorA. GAUME, Ralph
dc.contributor.authorI. KUMKOVA, Irina
dc.contributor.authorD. MASON, Brian
dc.contributor.authorMIGNARD, François
dc.contributor.authorG. MONET, David
dc.contributor.authorL. MUINOS HARO, Jose
dc.contributor.authorSOUCHAY AND SEAN E. URBAN, Jean
dc.date.issued2008
dc.date.conference2008
dc.description.abstractEnA continuation of this WG was voted for at the IAU GA 2006 in Prague. The International Celestial Reference Frame (ICRF) is defined by the positions of 212 distant quasars at radio wavelengths. The primary, optical reference frame is the Hipparcos Celestial Reference Frame (HCRF), which is the Hipparcos Catalog without astrometric ‘problem' stars (in: H. Rickman (ed.) 2001, Proceedings IAU XXIV General Assembly, Transactions IAU XXIVB (San Francisco: ASP), Resolution B1.2). The Tycho-2 catalog with its 2.5 million brightest stars forms the first step in the densification of the optical reference frame. However, the limiting magnitude of about V = 12 of the Tycho-2 catalog is not sufficient for most applications in astronomy and the goal of this IAU Working Group is to further extend the grid of highly accurate positions and motions toward more and fainter stars. The web site of this WG is at .
dc.language.isoen
dc.publisherEdited by Karel van der Hucht. Cambridge: Cambridge University Press
dc.source.titleProceedings of the International Astronomical Union, Volume 4, Transactions T27A, December 2008, pp 34-36
dc.title.enDivision I / Commission 8 / Working Group Densification of the Optical Reference Frame
dc.typeCommunication dans un congrès
dc.identifier.doi10.1017/S174392130802526X
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
bordeaux.page34-36
bordeaux.volume4
bordeaux.issue27
bordeaux.countryFR
bordeaux.title.proceedingProceedings of the International Astronomical Union, Volume 4, Transactions T27A, December 2008, pp 34-36
bordeaux.peerReviewedoui
hal.identifierhal-00398886
hal.version1
hal.invitednon
hal.proceedingsoui
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00398886v1
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