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<ri:Resource created="2011-05-20T15:07:23Z" 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>Matched SDSS and FIRST Sample</title><shortName>J/AJ/137/42</shortName><identifier>ivo://CDS.VizieR/J/AJ/137/42</identifier><altIdentifier>doi:10.26093/cds/vizier.51370042</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Rafter S.E.</name></creator><creator><name>Crenshaw D.M.</name></creator><creator><name>Wiita P.J.</name></creator><date role="Updated">2019-10-08T06:15:01Z</date><date role="Created">2011-05-20T15:07:23Z</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>seyfert-galaxies</subject><subject>radio-galaxies</subject><description>The question as to whether the distribution of radio loudness in active galactic nuclei (AGNs) is actually bimodal has been discussed extensively in the literature. Furthermore, there have been claims that radio loudness depends on black hole mass (M_BH_) and Eddington ratio (L_bol_/L_Edd_).We investigate these claims using the low- redshift broad line AGN sample of Greene &amp; Ho (2007ApJ...667..131G), which consists of 8434 objects at z&lt;0.35 from the Sloan Digital Sky Survey Fourth Data Release (SDSS DR4). We obtained radio fluxes from the Very Large Array Faint Images of the Radio Sky at Twenty-centimeters (FIRST) survey for the SDSS AGN. Out of the 8434 SDSS AGNs, 821 have corresponding observed radio fluxes in the FIRST survey.</description><source format="bibcode">2009AJ....137...42R</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/137/42</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/II/267">II/267 : The SDSS Photometric Catalog, DR 4 (Adelman-McCarthy+, 2006)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/VIII/71">VIII/71 : The FIRST Survey Catalog, Version 03Apr11 (Becker+ 2003)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/667/131">J/ApJ/667/131 : 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