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<ri:Resource created="2009-08-04T09:44:58Z" 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>GALEX/SDSS quasar catalog</title><shortName>J/AJ/133/1780</shortName><identifier>ivo://CDS.VizieR/J/AJ/133/1780</identifier><altIdentifier>doi:10.26093/cds/vizier.51331780</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Trammell G.B.</name></creator><creator><name>Vanden Berk D.E.</name></creator><creator><name>Schneider D.P.</name></creator><creator><name>Richards G.T.</name></creator><creator><name>Hall P.B.,Anderson S.F.</name></creator><creator><name>Brinkmann J.</name></creator><date role="Updated">2017-06-26T11:49:03Z</date><date role="Created">2009-08-04T09:44:58Z</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>quasars</subject><subject>ultraviolet-astronomy</subject><subject>visible-astronomy</subject><subject>sloan-photometry</subject><description>We present an analysis of the broadband UV and optical properties of z~&lt;3.4 quasars matched in the Galaxy Evolution Explorer (GALEX) General Data Release 1 (GR1) and the Sloan Digital Sky Survey (SDSS) Data Release 3 (DR3). Of the 6371 SDSS DR3 quasars covered by 204 GALEX GR1 tiles, 5380 (84%) have near-UV detections, while 3034 (48%) have both near-UV and far-UV detections using a matching radius of 7". 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