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<ri:Resource created="2009-04-02T17:48:31Z" status="active" updated="2025-05-19T09:50:00Z" version="1.2" xmlns:cs="http://www.ivoa.net/xml/ConeSearch/v1.0" xmlns:ri="http://www.ivoa.net/xml/RegistryInterface/v1.0" xmlns:vr="http://www.ivoa.net/xml/VOResource/v1.0" xmlns:vs="http://www.ivoa.net/xml/VODataService/v1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.ivoa.net/xml/ConeSearch/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/ConeSearch.xsd http://www.ivoa.net/xml/VOResource/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/VOResource.xsd http://www.ivoa.net/xml/VODataService/v1.1 http://vo.ari.uni-heidelberg.de/docs/schemata/VODataService.xsd" xsi:type="vs:CatalogService"><title>Fifth VLBA calibrator survey: VCS5</title><shortName>J/AJ/133/1236</shortName><identifier>ivo://CDS.VizieR/J/AJ/133/1236</identifier><altIdentifier>doi:10.26093/cds/vizier.51331236</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Kovalev Y.Y.</name></creator><creator><name>Petrov L.</name></creator><creator><name>Fomalont E.B.</name></creator><creator><name>Gordon D.</name></creator><date role="Updated">2016-07-28T11:44:54Z</date><date role="Created">2009-04-02T17:48:31Z</date><contact><name>CDS support team</name><address>CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France</address><email>cds-question@unistra.fr</email></contact></curation><content><subject>surveys</subject><subject>radio-sources</subject><subject>astrometry</subject><description>This paper presents the fifth part of the Very Long Baseline Array (VLBA) Calibrator Survey (VCS), containing 569 sources not observed previously with very long baseline interferometry in geodetic or absolute astrometry programs. This campaign has two goals: (1) to observe additional sources that, together with previous survey results, form a complete sample, and (2) to find new strong sources suitable as phase calibrators. This VCS extension was based on three 24-hr VLBA observing sessions in 2005. It detected almost all extragalactic flat-spectrum sources with correlated flux density greater than 200mJy at 8.6GHz above declination -30{deg} that were not observed previously. Source positions with milliarcsecond accuracy were derived from astrometric analysis of ionosphere-free combinations of group delays determined from the 2.3 and 8.6GHz frequency bands. The VCS5 catalog of source positions, plots of correlated flux density versus projected baseline length, contour plots, and FITS files of naturally weighted CLEAN images, as well as calibrated visibility function files, are available on the World Wide Web at http://vlbi.gsfc.nasa.gov/vcs5</description><source format="bibcode">2007AJ....133.1236K</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/133/1236</referenceURL><type>Catalog</type><contentLevel>Research</contentLevel><relationship><relationshipType>IsServedBy</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/TAP">TAP VizieR generic service</relatedResource></relationship><relationship><relationshipType>IsServedBy</relationshipType><relatedResource>Conesearch service</relatedResource></relationship><relationship><relationshipType>related-to</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/VIII/65">VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJS/141/13">J/ApJS/141/13 : VLBA calibrator Survey - VCS1 catalog (Beasley+, 2002)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/126/2562">J/AJ/126/2562 : Second VLBA calibrator survey: VCS2 (Fomalont+, 2003)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/129/1163">J/AJ/129/1163 : Third VLBA calibrator survey: VCS3 (Petrov+, 2005)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/131/1872">J/AJ/131/1872 : Fourth VLBA calibrator survey: VCS4 (Petrov+, 2006)</relatedResource><relatedResource>http://vlbi.gsfc.nasa.gov/vcs5 : VCS5 Home Page</relatedResource></relationship></content><rights>https://cds.unistra.fr/vizier-org/licences_vizier.html</rights><capability><interface xsi:type="vr:WebBrowser"><accessURL use="full">https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/133/1236</accessURL><mirrorURL title="VizieR at IUCAA: Pune, 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