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<ri:Resource created="2002-01-30T22:01:26Z" 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>RBSC-NVSS sample. I.</title><shortName>J/ApJS/129/547</shortName><identifier>ivo://CDS.VizieR/J/ApJS/129/547</identifier><altIdentifier>doi:10.26093/cds/vizier.21290547</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Bauer F.E.</name></creator><creator><name>Condon J.J.</name></creator><creator><name>Thuan T.X.</name></creator><creator><name>Broderick J.J.</name></creator><date role="Updated">2002-01-30T21:06:08Z</date><date role="Created">2002-01-30T22:01:26Z</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>radio-sources</subject><subject>surveys</subject><subject>astronomical-object-identification</subject><description>We cross-identified the ROSAT Bright Source Catalog (RBSC, Cat. &lt;IX/10&gt;) and the NRAO VLA Sky Survey (NVSS, Cat. &lt;VIII/65&gt;) to construct the RBSC-NVSS sample of the brightest X-ray sources (&gt;=0.1 counts/s~10^-12^erg/cm^2^/s in the 0.1-2.4keV band) that are also radio sources (S&gt;=2.5mJy at 1.4GHz) in the 7.8sr of extragalactic sky with |b|&gt;15{deg} and {delta}&gt;-40{deg}. The sky density of NVSS sources is low enough that they can be reliably identified with RBSC sources having rms positional uncertainties &gt;=10". We used the more accurate radio positions to make reliable X-ray/radio/optical identifications down to the POSS plate limits. We obtained optical spectra for many of the bright identifications lacking published redshifts. The resulting X-ray/radio sample is unique in its size (1557 objects), composition (a mixture of nearly normal galaxies, Seyfert galaxies, quasars, and clusters), and low average redshift [&lt;z&gt;~0.1]</description><source format="bibcode">2000ApJS..129..547B</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/129/547</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/IX/10">IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/VIII/65">VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) 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IX/10) 1RXS object name</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType" arraysize="16*">char</dataType><flag>primary</flag></column><column><name>n_1RXS</name><description>[N] indicates a note detailed in file notes.dat</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>Name</name><description>Common name found in NED (2000)</description><ucd>meta.id</ucd><dataType xsi:type="vs:VOTableType" arraysize="23*">char</dataType></column><column><name>NED</name><description>Get the NED details</description><ucd>meta.ref</ucd><dataType xsi:type="vs:VOTableType" arraysize="*">char</dataType></column><column><name>Sx</name><description>? 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B magnitude from NED (2000) or USNO-A2 cat.</description><unit>mag</unit><ucd>phot.mag;em.opt.B</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>r_Bmag</name><description>[*] '*' indicates a magnitude from USNO-A2 (Cat. &lt;I/252&gt;).</description><ucd>meta.ref</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>z</name><description>? Redshift</description><ucd>src.redshift</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>u_z</name><description>[?] '?': redshift uncertain</description><ucd>meta.code.error</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>r_z</name><description>[1,3]? 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