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<ri:Resource created="2007-11-07T22:43:58Z" 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>3{sigma} hard sample of XMDS survey</title><shortName>J/A+A/467/73</shortName><identifier>ivo://CDS.VizieR/J/A+A/467/73</identifier><altIdentifier>doi:10.26093/cds/vizier.34670073</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Tajer M.</name></creator><creator><name>Polletta M.</name></creator><creator><name>Chiappetti L.</name></creator><creator><name>Maraschi L.</name></creator><creator><name>Trinchieri G.,Maccagni D.</name></creator><creator><name>Andreon S.</name></creator><creator><name>Garcet O.</name></creator><creator><name>Surdej J.</name></creator><creator><name>Pierre M.</name></creator><creator><name>Le Fevre O.,Franceschini A.</name></creator><creator><name>Lonsdale C.J.</name></creator><creator><name>Surace J.A.</name></creator><creator><name>Shupe D.L.</name></creator><creator><name>Fang F.,Rowan-Robinson M.</name></creator><creator><name>Smith H.E.</name></creator><creator><name>Tresse L.</name></creator><date role="Updated">2007-11-07T21:49:21Z</date><date role="Created">2007-11-07T22:43:58Z</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>surveys</subject><subject>active-galactic-nuclei</subject><subject>x-ray-sources</subject><subject>infrared-sources</subject><subject>redshifted</subject><subject>infrared-photometry</subject><subject>visible-astronomy</subject><subject>broad-band-photometry</subject><description>Our goal is to probe the populations of obscured and unobscured AGN investigating their optical-IR and X-ray properties as a function of X-ray flux, luminosity and redshift within a hard X-ray selected sample with wide multiwavelength coverage. We selected a sample of 136 X-ray sources detected at a significance of &gt;=3{sigma} in the 2-10keV band (F_2-10_&gt;~10^-14^erg/cm^2^/s) in a ~1deg^2^ area in the XMM Medium Deep Survey (XMDS, Cat. &lt;J/A+A/439/413&gt;). The XMDS area is covered with optical photometry from the VVDS and CFHTLS surveys and infrared Spitzer data from the SWIRE survey. Based on the X-ray luminosity and X-ray to optical ratio, 132 sources are likely AGN, of which 122 have unambiguous optical - IR identification. The observed optical and IR spectral energy distributions of all identified sources are fitted with AGN/galaxy templates in order to classify them and compute photometric redshifts. X-ray spectral analysis is performed individually for sources with a sufficient number of counts and using a stacking technique for subsamples of sources at different flux levels. Hardness ratios are used to estimate X-ray absorption in individual weak sources.</description><source format="bibcode">2007A&amp;A...467...73T</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/467/73</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/250">III/250 : The VIMOS VLT deep survey (VVDS-DEEP) (Le Fevre+ 2005)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/461/81">J/A+A/461/81 : Galaxy clusters in the CFHTLS (Olsen+, 2007)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/403/857">J/A+A/403/857 : VLA-VIRMOS Deep Field (Bondi+, 2003)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/591/640">J/ApJ/591/640 : XMM-LSS low-frequency radio counterparts (Cohen+, 2003)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/439/413">J/A+A/439/413 : XMDS/VVDS 4{sigma} catalogue (Chiappetti+, 2005)</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/467/73</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/467/73</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/467/73</mirrorURL></interface></capability><capability><interface xsi:type="vs:ParamHTTP"><accessURL use="base">https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/467/73</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/467/73</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/467/73</mirrorURL><queryType>GET</queryType><resultType>text/xml+votable</resultType></interface></capability><capability standardID="ivo://ivoa.net/std/TAP#aux"><interface xsi:type="vs:ParamHTTP" role="std"><accessURL use="base">https://tapvizier.cds.unistra.fr/TAPVizieR/tap</accessURL></interface></capability><capability xsi:type="cs:ConeSearch" standardID="ivo://ivoa.net/std/ConeSearch"><description>Cone search capability for table J/A+A/467/73/tablea1 (The 3{sigma} hard sample)</description><interface xsi:type="vs:ParamHTTP" role="std"><accessURL use="base">https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/467/73/tablea1?</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/467/73/tablea1?</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/467/73/tablea1?</mirrorURL><queryType>GET</queryType><resultType>text/xml+votable</resultType></interface><maxSR>180.0</maxSR><maxRecords>50000</maxRecords><verbosity>true</verbosity><testQuery><ra>36.33782917</ra><dec>-4.66346556</dec><sr>0.005555555555555556</sr></testQuery></capability><coverage><spatial>6/17683 17686 17689 17692 17694</spatial><footprint ivo-id="ivo://ivoa.net/std/moc">https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/467/73?format=ascii</footprint><waveband>X-ray</waveband><waveband>Optical</waveband><waveband>Infrared</waveband></coverage><tableset><schema><name>default</name><table><name>J/A+A/467/73/tablea1</name><description>The 3{sigma} hard sample</description><column><name>recno</name><description>Record number assigned by the VizieR team. 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