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Characterisation of Long Baseline Calibrators at 2.3 GHz

dc.contributor.authorHUNGWE, F.
hal.structure.identifierU.S. Naval Observatory
dc.contributor.authorOJHA, R.
dc.contributor.authorBOOTH, R. S.
dc.contributor.authorBIETENHOLZ, M. F.
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierUniversité Sciences et Technologies - Bordeaux 1 [UB]
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
dc.contributor.authorCOLLIOUD, A.
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierUniversité Sciences et Technologies - Bordeaux 1 [UB]
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
dc.contributor.authorCHARLOT, P.
dc.contributor.authorBOBOLTZ, D.
hal.structure.identifierU.S. Naval Observatory
dc.contributor.authorFEY, A. L.
dc.date.created2011-06-14
dc.date.issued2011
dc.identifier.issn0035-8711
dc.description.abstractEnWe present a detailed multi-epoch analysis of 31 potential southern hemisphere radio calibrators that were originally observed as part of a program to maintain the International Celestial Reference Frame (ICRF). At radio wavelengths, the primary calibrators are Active Galactic Nuclei (AGN), powerful radio emitters which exist at the centre of most galaxies. These are known to vary at all wavelengths at which they have been observed. By determining the amount of radio source structure and variability of these AGN, we determine their suitability as phase calibrators for long baseline radio interferometry at 2.3 GHz. For this purpose, we have used a set of complementary metrics to classify these 31 southern sources into five categories pertaining to their suitability as VLBI calibrators. We find that all of the sources in our sample would be good interferometric calibrators and almost ninety per cent would be very good calibrators.
dc.language.isoen
dc.publisherOxford University Press (OUP): Policy P - Oxford Open Option A
dc.subject.enAstrophysics
dc.subject.enCosmology and Extragalactic Astrophysics
dc.title.enCharacterisation of Long Baseline Calibrators at 2.3 GHz
dc.typeArticle de revue
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Instrumentation et méthodes pour l'astrophysique [astro-ph.IM]
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Instrumentation et méthodes pour l'astrophysique [astro-ph.IM]
dc.identifier.arxiv1106.2669
bordeaux.journalMonthly Notices of the Royal Astronomical Society
bordeaux.page2113-2120
bordeaux.volume418
bordeaux.issue4
bordeaux.peerReviewedoui
hal.identifierhal-00606073
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00606073v1
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