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<ri:Resource created="2012-06-07T15:41:49Z" status="active" updated="2025-06-13T15:25:00Z" 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>Celestial Reference Frame at 24 and 43 GHz</title><shortName>J/AJ/139/1695</shortName><identifier>ivo://CDS.VizieR/J/AJ/139/1695</identifier><altIdentifier>doi:10.26093/cds/vizier.51391695</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Lanyi G.E.</name></creator><creator><name>Boboltz D.A.</name></creator><creator><name>Charlot P.</name></creator><creator><name>Fey A.L.</name></creator><creator><name>Fomalont E.B.,Geldzahler B.J.</name></creator><creator><name>Gordon D.</name></creator><creator><name>Jacobs C.S.</name></creator><creator><name>Ma C.</name></creator><creator><name>Naudet C.J.</name></creator><creator><name>Romney J.D.,Sovers O.J.</name></creator><creator><name>Zhang L.D.</name></creator><date role="Updated">2017-12-18T07:57:43Z</date><date role="Created">2012-06-07T15:41:49Z</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>optical-observation</subject><subject>catalogs</subject><subject>astrometry</subject><subject>very-long-baseline-interferometry</subject><subject>quasars</subject><description>We present astrometric results for compact extragalactic objects observed with the Very Long Baseline Array at radio frequencies of 24 and 43GHz. Data were obtained from ten 24-hr observing sessions made over a five-year period. These observations were motivated by the need to extend the International Celestial Reference Frame (ICRF) to higher radio frequencies to enable improved deep space navigation after 2016 and to improve state-of-the-art astrometry. Source coordinates for 268 sources were estimated at 24GHz and for 131 sources at 43GHz.</description><source format="bibcode">2010AJ....139.1695L</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/139/1695</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/I/251">I/251 : VLBI International Celestial Reference Frame (ICRF) (Ma+, 1997)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/127/3587">J/AJ/127/3587 : VLBI ICRF. II (Fey+, 2004)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/139/1713">J/AJ/139/1713 : Celestial Reference Frame at 24 and 43GHz. II. 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