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<ri:Resource created="2018-08-24T12:07:26Z" 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>Optical identification of S4 sources</title><shortName>J/A+AS/103/349</shortName><identifier>ivo://CDS.VizieR/J/A+AS/103/349</identifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>STICKEL M.</name></creator><creator><name>KUEHR H.</name></creator><date role="Updated">2018-08-24T11:18:39Z</date><date role="Created">2018-08-24T12:07:26Z</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>astronomical-object-identification</subject><description>An update of the optical identification status of the S4 radio source catalogue is presented. An extensive literature search has been made to gather the types of the optical counterparts, their magnitudes and redshifts. As far as possible, references to other optical catalogues are given for these data, which are often supplemented by more detailed notes on individual sources. Accurate radio positions taken from the literature are given for a large fraction of the sources.</description><source format="bibcode">1994A&amp;AS..103..349S</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/103/349</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/III/175">III/175 : Optical spectroscopy of radio sources (Stickel+, 1989-94)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+AS/98/393">J/A+AS/98/393 : 1Jy BL Lac Objects: Observational Data (Stickel+ 1993)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+AS/105/67">J/A+AS/105/67 : Optical spectroscopy of 1Jy, S4 and S5 sources (Stickel+ 1994)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+AS/105/211">J/A+AS/105/211 : Optical identification status of 1Jy catalogue (Stickel+ 1994)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+AS/115/11">J/A+AS/115/11 : Optical identifications of radio sources (Stickel+, 1996)</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/A+AS/103/349</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/103/349</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/103/349</mirrorURL></interface></capability><capability><interface 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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>Class</name><description>Source Class</description><ucd>src.class</ucd><dataType xsi:type="vs:VOTableType" arraysize="49*">char</dataType></column></table><table><name>J/A+AS/103/349/notes</name><description>Notes on individual S4 sources</description><column><name>recno</name><description>Record number assigned by the VizieR team. Should Not be used for identification.</description><ucd>meta.record</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Name</name><description>S4 source name</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType" arraysize="10*">char</dataType></column><column><name>Comments</name><description>Comments</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="69*">char</dataType></column></table><table><name>J/A+AS/103/349/table1</name><description>The S4 radio source catalogue</description><column><name>recno</name><description>Record number assigned by the VizieR team. Should Not be used for identification.</description><ucd>meta.record</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Seq</name><description>[1/270]+ Sequence Number</description><ucd>meta.id</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>primary</flag><flag>indexed</flag></column><column><name>Object</name><description>Object name</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType" arraysize="8*">char</dataType></column><column><name>RA1950</name><description>Right Ascension 1950</description><ucd>pos.eq.ra;meta.main</ucd></column><column><name>DE1950</name><description>Declination 1950</description><ucd>pos.eq.dec;meta.main</ucd></column><column><name>r_pos</name><description>Reference to the radio position</description><ucd>meta.ref;pos.frame</ucd><dataType xsi:type="vs:VOTableType" arraysize="3*">char</dataType></column><column><name>m</name><description>[9/24]? Magnitude of the optical identification</description><unit>mag</unit><ucd>phot.mag</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>u_m</name><description>[*] '*' when no magnitude available</description><ucd>meta.code.error</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>Type</name><description>Type of the optical identification (1)</description><ucd>src.class</ucd><dataType xsi:type="vs:VOTableType" arraysize="6*">char</dataType></column><column><name>l_z</name><description>greater sign (&gt;) for lower redshift limits</description><ucd>meta.code.error;src.redshift</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>z</name><description>]0/4]? Redshift</description><ucd>src.redshift</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>u_z</name><description>[?*] '?' for uncertain value '*' when no magnitude available</description><ucd>meta.code.error;src.redshift</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>S(5GHz)</name><description>5GHz flux</description><unit>Jy</unit><ucd>phot.flux.density;em.radio.3-6GHz</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>s(11-6)</name><description>two-point spectral index between 11 and 6 cm</description><ucd>spect.index;em.radio.3-6GHz</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Comments</name><description>References to other compilations and individual notes (2)</description><ucd>meta.bib</ucd><dataType xsi:type="vs:VOTableType" arraysize="33*">char</dataType></column><column><name>RCat</name><description>Display data from Stickel+, 1989-94, III/175</description><ucd>meta.ref.url</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>_RA.icrs</name><description>Right ascension (ICRS) (computed by VizieR, not part of the original data. 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