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Source structure: an essential piece of information for generating the next ICRF

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.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorCHARLOT, P.
hal.structure.identifierUS Naval Observatory [US NAVAL OBSERVATORY]
dc.contributor.authorFEY, A. L.
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.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorCOLLIOUD, A.
hal.structure.identifierUS Naval Observatory [US NAVAL OBSERVATORY]
dc.contributor.authorOJHA, R.
hal.structure.identifierUS Naval Observatory [US NAVAL OBSERVATORY]
dc.contributor.authorBOBOLTZ, D. A.
hal.structure.identifierObservatorio do Valongo
dc.contributor.authorCAMARGO, J. I. B.
dc.date.issued2008
dc.date.conference2007
dc.description.abstractEnThe intrinsic radio structure of the extragalactic sources is one of the limiting factors in defining the International Celestial Reference Frame (ICRF). This paper reports about the ongoing work to monitor the structural evolution of the ICRF sources by using the Very Long Baseline Array and other VLBI telescopes around the world. Based on more than 5000 VLBI images produced from such observations, we have assessed the astrometric suitability of 80% of the ICRF sources. The number of VLBI images for a given source varies from 1 for the least-observed sources to more than 20 for the intensively-observed sources. Overall, we identify a subset of 194 sources that are highly compact at any of the available epochs and which are prime candidates for the realization of the next ICRF with the highest accuracy.
dc.language.isoen
dc.source.titleA Giant Step: from Milli- to Micro-arcsecond Astrometry, Proceedings of the International Astronomical Union, IAU Symposium, 2008IAUS..248..344C
dc.subject.enastrometry
dc.subject.enreference systems
dc.subject.enquasars: general
dc.title.enSource structure: an essential piece of information for generating the next ICRF
dc.typeCommunication dans un congrès
dc.identifier.doi10.1017/S1743921308019534
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
bordeaux.page344-347
bordeaux.volume248
bordeaux.countryFR
bordeaux.title.proceedingA Giant Step: from Milli- to Micro-arcsecond Astrometry, Proceedings of the International Astronomical Union, IAU Symposium, 2008IAUS..248..344C
bordeaux.peerReviewedoui
hal.identifierhal-00401818
hal.version1
hal.invitednon
hal.proceedingsoui
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00401818v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.btitle=A%20Giant%20Step:%20from%20Milli-%20to%20Micro-arcsecond%20Astrometry,%20Proceedings%20of%20the%20International%20Astronomical%20Union,%20IAU%20Symposium,%202008IAUS..24&rft.date=2008&rft.volume=248&rft.spage=344-347&rft.epage=344-347&rft.au=CHARLOT,%20P.&FEY,%20A.%20L.&COLLIOUD,%20A.&OJHA,%20R.&BOBOLTZ,%20D.%20A.&rft.genre=unknown


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