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<ri:Resource created="2004-07-08T21:23:15Z" 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>XBACs, the sample</title><shortName>J/MNRAS/281/799</shortName><identifier>ivo://CDS.VizieR/J/MNRAS/281/799</identifier><altIdentifier>doi:10.26093/cds/vizier.72810799</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Ebeling H.</name></creator><creator><name>Voges W.</name></creator><creator><name>Bohringer H.</name></creator><creator><name>Edge A.C.</name></creator><creator><name>Huchra J.P.</name></creator><creator><name>Briel U.G.</name></creator><date role="Updated">2024-06-25T20:17:36Z</date><date role="Created">2004-07-08T21:23:15Z</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>galaxy-clusters</subject><subject>x-ray-sources</subject><subject>redshifted</subject><description>We present an essentially complete, all-sky, X-ray flux-limited sample of 242 Abell clusters of galaxies (six of which are double) compiled from ROSAT All-Sky Survey data. Our sample is uncontaminated in the sense that systems featuring prominent X-ray point sources such as AGN or foreground stars have been removed. The sample is limited to high Galactic latitudes (|b|&gt;=20{deg}), the nominal redshift range of the ACO catalogue of z&lt;=0.2, and X-ray fluxes above 5.0x10^-12^erg/cm^2^/s in the 0.1-2.4keV band. Owing to the X-ray flux limit, our sample consists, at intermediate and high redshifts, exclusively of very X-ray-luminous clusters. Since the latter tend to be also optically rich, the sample is not affected by the optical selection effects and, in particular, not by the volume incompleteness known to be present in the Abell and ACO catalogues for richness class 0 and 1 clusters. Our sample is the largest X-ray flux-limited sample of galaxy clusters compiled to date and will allow investigations of unprecedented statistical quality into the properties and distribution of rich clusters in the local Universe.</description><source format="bibcode">1996MNRAS.281..799E</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/281/799</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/J/MNRAS/301/881">J/MNRAS/301/881 : The ROSAT brightest cluster sample - I. (Ebeling+, 1998)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/MNRAS/306/857">J/MNRAS/306/857 : ROSAT Brightest Cluster Sample. III. (Crawford+, 1999)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/MNRAS/318/333">J/MNRAS/318/333 : Extended ROSAT Bright Cluster Sample (Ebeling+ 2000)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/502/558">J/ApJ/502/558 : Catalog of ROSAT galaxy clusters (Vikhlinin+ 1998)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/514/148">J/ApJ/514/148 : ROSAT survey of bright galaxies clusters (De Grandi+, 1999)</relatedResource></relationship></content><rights>https://cds.unistra.fr/vizier-org/licences_vizier.html</rights><capability><interface xsi:type="vr:WebBrowser"><accessURL use="full">https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/281/799</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/281/799</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South 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Should Not be used for identification.</description><ucd>meta.record</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Notes</name><description>[GL*c ] Notes (1)</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="4*">char</dataType></column><column><name>ACO</name><description>Abell Cluster number (Cat. 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