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Selecting defining sources for the next ICRF based on source structure

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.identifierU.S. 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.identifierU.S. Naval Observatory
dc.contributor.authorOJHA, R.
hal.structure.identifierU.S. Naval Observatory
dc.contributor.authorBOBOLTZ, D. A.
dc.contributor.authorCAMARGO, J. I. B.
dc.date.issued2008
dc.date.conference2007-09-17
dc.description.abstractEnThe intrinsic radio structure of the extragalactic sources is one of the limiting errors in the definition of 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. From this analysis, we identify a subset of 194 sources that are highly compact at any of the available epochs. Such sources are prime candidates to define the next ICRF with the highest accuracy.
dc.language.isoen
dc.source.titleProceedings of the "Journées Systèmes de Référence Spatio-temporels 2007". Observatoire de Paris, 17-19 September 2007. Editor: Nicole Capitaine. ISBN: 978-2-901057-59-8, 2008jsrs.meet....8C
dc.title.enSelecting defining sources for the next ICRF based on source structure
dc.typeCommunication dans un congrès
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.page8
bordeaux.conference.titleJournées Systèmes de Référence Spatio-temporels 2007
bordeaux.countryFR
bordeaux.title.proceedingProceedings of the "Journées Systèmes de Référence Spatio-temporels 2007". Observatoire de Paris, 17-19 September 2007. Editor: Nicole Capitaine. ISBN: 978-2-901057-59-8, 2008jsrs.meet....8C
bordeaux.conference.cityParis
bordeaux.peerReviewedoui
hal.identifierhal-00401825
hal.version1
hal.invitednon
hal.proceedingsoui
hal.conference.end2007-09-19
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00401825v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.btitle=Proceedings%20of%20the%20%22Journ%C3%A9es%20Syst%C3%A8mes%20de%20R%C3%A9f%C3%A9rence%20Spatio-temporels%202007%22.%20Observatoire%20de%20Paris,%2017-19%20September%20200&rft.date=2008&rft.spage=8&rft.epage=8&rft.au=CHARLOT,%20P.&FEY,%20A.%20L.&COLLIOUD,%20A.&OJHA,%20R.&BOBOLTZ,%20D.%20A.&rft.genre=unknown


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