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<ri:Resource created="2009-12-27T20:40:06Z" 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>DLAs in SDSS-DR7</title><shortName>J/A+A/505/1087</shortName><identifier>ivo://CDS.VizieR/J/A+A/505/1087</identifier><altIdentifier>doi:10.26093/cds/vizier.35051087</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Noterdaeme</name></creator><creator><name>P.</name></creator><creator><name>Petitjean P.</name></creator><creator><name>Ledoux C.</name></creator><creator><name>Srianand R.</name></creator><date role="Updated">2018-02-01T11:50:43Z</date><date role="Created">2009-12-27T20:40:06Z</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>quasars</subject><subject>spectroscopy</subject><subject>h-i-line-emission</subject><subject>redshifted</subject><subject>line-intensities</subject><description>We present a study of the evolution of the cosmological mass density of neutral gas using a fully automatic search for Damped Lyman-alpha systems in the Sloan Digital Sky Survey II Data Release 7.</description><source format="bibcode">2009A&amp;A...505.1087N</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/505/1087</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/J/ApJ/543/552">J/ApJ/543/552 : z&gt;3 damped Ly{alpha} abs. systems (Storrie-Lombardi+, 2000)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/other/PASA/19.455">J/other/PASA/19.455 : Damped Lyman alpha absorption of QSOs (Curran+, 2002)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/MNRAS/354/L31">J/MNRAS/354/L31 : SDSS DR2 QSO and DLA properties (Murphy+, 2004)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/MNRAS/346/1103">J/MNRAS/346/1103 : Redshifts of damped Lyman{alpha} absorbers (Peroux+, 2003)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/PASP/116/622">J/PASP/116/622 : SDSS damped Ly{alpha} survey: DR1 (Prochaska+, 2004)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/635/123">J/ApJ/635/123 : The SDSS-DR3 damped Ly{alpha} survey (Prochaska+, 2005)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/636/610">J/ApJ/636/610 : Damped Ly{alpha} systems at z&lt;1.65 (Rao+, 2006)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/PASP/118/1077">J/PASP/118/1077 : Metal-strong damped Ly{alpha} systems (Herbert-Fort+, 2006)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/473/791">J/A+A/473/791 : CIV absorption in DLAs and sub-DLAs systems (Fox+, 2007)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/661/88">J/ApJ/661/88 : Zn measurements in sub-DLAs and DLAs QSOs (Kulkarni+, 2007)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJS/171/29">J/ApJS/171/29 : UCSD/Keck DLA Abundance Database (Prochaska+, 2009)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/MNRAS/392/998">J/MNRAS/392/998 : Damped Lyman{alpha} systems (Ellison+, 2009)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/478/701">J/A+A/478/701 : SDSS quasars with DLA systems color excess (Vladilo+, 2008)</relatedResource><relatedResource>http://sdss.org/ : SDSS Home Page</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+A/505/1087</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/505/1087</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South 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Rest equivalent width of MgII 2796</description><unit>0.1nm</unit><ucd>spect.line.eqWidth</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_WMgII2796</name><description>? Error on MgII2796 or upper-limit (2)</description><unit>0.1nm</unit><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>WMgII2803</name><description>? Rest equivalent width of MgII 2803</description><unit>0.1nm</unit><ucd>spect.line.eqWidth</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_WMgII2803</name><description>? 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