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<ri:Resource created="2004-07-25T11:04:18Z" 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>Redshifts and Velocity Dispersions for Abell Clusters</title><shortName>VII/177</shortName><identifier>ivo://CDS.VizieR/VII/177</identifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Struble M.F.</name></creator><creator><name>Rood H.J.</name></creator><date role="Updated">2017-10-11T05:13:16Z</date><date role="Created">2004-07-25T11:04:18Z</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>redshifted</subject><description>The catalog presents a list of redshifts for 758 Abell clusters, and velocity dispersions for 121, published as of 1991 March. We present another list of 33 Abell clusters with published redshifts, most of which are probably redshifts of foreground or background galaxies superposed on, or near, the Abell clusters. Over the past 4 years, the published number of redshifts of member galaxies in clusters increased by a factor of 2.0, but the number of cluster redshifts increased by only a factor of 1.3, while the number of cluster velocity dispersions derived from 50 or more redshifts of member galaxies increased by a factor of 3.8 (from 6 to 23).</description><source format="bibcode">1991ApJS...77..363S</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/VII/177</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/VII/165">VII/165 : Measured Redshifts of Abell Clusters of 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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>Abell</name><description>[1,2703]+= Abell number</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>f_Abell</name><description>[* ] * denotes membership in Abell's non- statistical sample.</description><ucd>meta.code</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>m_Abell</name><description>[BCENS] suffix to Abell number (see paper, p363R-p364L)</description><ucd>meta.code.multip</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>RAB1950</name><description>Right ascension (B1950) of cluster center</description><ucd>pos.eq.ra;meta.main</ucd></column><column><name>DEB1950</name><description>declination of the cluster center (B1950)</description><ucd>pos.eq.dec;meta.main</ucd></column><column><name>l_Nz</name><description>[&gt;] limit flag of Nz</description><ucd>meta.code.error</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>Nz</name><description>? number of galaxies used to determine z (see paper, p364)</description><unit>ct</unit><ucd>meta.number</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>sig</name><description>[0,]? adopted sigma in the rest frame of cluster (see paper, p364)</description><unit>km/s</unit><ucd>phys.veloc.dispersion</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>Note</name><description>[a-g] existence if a note</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>zSR1</name><description>? adopted z listed in SR1 (1987ApJS...63..543S)</description><ucd>src.redshift;pos.heliocentric</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>l_nSR1</name><description>[&gt;] limit flag of Nsr1</description><ucd>meta.code.error</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>nSR1</name><description>[0,]? number of redshifts used to determine zSR1</description><unit>ct</unit><ucd>meta.number</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>sigSR1</name><description>[0,]? adopted sigma determined from references in SR1 (1987ApJS...63..543S)</description><unit>km/s</unit><ucd>phys.veloc.dispersion</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>zNew</name><description>? z from a source more recent than, or not contained in SR1 (1987ApJS...63..543S)</description><ucd>src.redshift</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>l_nNew</name><description>[&gt;] limit flag of nNew</description><ucd>meta.code.error</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>nNew</name><description>[0,]? number of redshifts used to determine zNew (see paper, p364)</description><unit>ct</unit><ucd>meta.number</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>sigNew</name><description>[0,]? sigma determined from redshifts of cluster members contained in the new references in r_zNew</description><unit>km/s</unit><ucd>phys.veloc.dispersion</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>r_zNew</name><description>[0-9,] code for reference source of the data in zNew, nNew, and sigNew</description><ucd>meta.ref;pos.frame</ucd><dataType xsi:type="vs:VOTableType" arraysize="7*">char</dataType></column><column><name>Simbad</name><description>Simbad column added by the CDS</description><ucd>meta.ref</ucd><dataType xsi:type="vs:VOTableType" arraysize="*">char</dataType></column><column><name>NED</name><description>Simbad column added by the CDS</description><ucd>meta.ref</ucd><dataType xsi:type="vs:VOTableType" arraysize="*">char</dataType></column><column><name>_RA.icrs</name><description>Right ascension (ICRS) (computed by VizieR, not part of the original data)</description><ucd>pos.eq.ra</ucd><flag>nullable</flag><flag>indexed</flag></column><column><name>_DE.icrs</name><description>Declination (ICRS) (computed by VizieR, not part of the original data)</description><ucd>pos.eq.dec</ucd><flag>nullable</flag><flag>indexed</flag></column></table><table><name>VII/177/refs</name><description>reference list for the table</description><column><name>recno</name><description>Record number assigned by the VizieR team. 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