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<ri:Resource created="2020-08-20T15:11:55Z" 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>QSOs properties</title><shortName>J/ApJ/625/78</shortName><identifier>ivo://CDS.VizieR/J/ApJ/625/78</identifier><altIdentifier>doi:10.26093/cds/vizier.16250078</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Hao C.N.</name></creator><creator><name>Xia X.Y.</name></creator><creator><name>Mao S.</name></creator><creator><name>Wu H.</name></creator><creator><name>Deng Z.G.</name></creator><date role="Updated">2020-11-26T08:46:17Z</date><date role="Created">2020-08-20T15:11:55Z</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>active-galactic-nuclei</subject><subject>quasars</subject><description>We study the properties of infrared-selected QSOs (IR QSOs), optically selected Palomar-Green QSOs (PG QSOs), and narrow-line Seyfert 1 galaxies (NLS1s). 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