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<ri:Resource created="2023-11-09T08:04:39Z" status="active" updated="2026-08-03T07:30:30Z" 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>New constraints on the 1.4GHz source counts</title><shortName>J/MNRAS/500/22</shortName><identifier>ivo://CDS.VizieR/J/MNRAS/500/22</identifier><altIdentifier>doi:10.26093/cds/vizier/bg-fm-p</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Bonato M.</name></creator><creator><name>Prandoni I.</name></creator><creator><name>De Zotti G.</name></creator><creator><name>Brienza M.</name></creator><creator><name>Morganti R.</name></creator><creator><name>Vaccari M.</name></creator><date role="Updated">2026-08-03T07:30:30Z</date><date role="Created">2023-11-09T08:04:39Z</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>active-galactic-nuclei</subject><subject>galaxies</subject><subject>millimeter-astronomy</subject><subject>submillimeter-astronomy</subject><subject>radio-sources</subject><subject>redshifted</subject><description>We present a study of the 1173 sources brighter than S_1.4GHz_=120{mu}Jy detected over an area of ~1.4deg^2^ in the Lockman Hole field. Exploiting the multiband information available in this field for ~79 per cent of the sample, sources have been classified into radio loud (RL) active galactic nuclei (AGNs), star-forming galaxies (SFGs), and radio quiet (RQ) AGNs, using a variety of diagnostics available in the literature. Exploiting the observed tight anticorrelations between IRAC band 1 or band 2 and the source redshift we could assign a redshift to 177 sources missing a spectroscopic measurement or a reliable photometric estimate. A Monte Carlo approach was used to take into account the spread around the mean relation. The derived differential number counts and luminosity functions at several redshifts of each population show a good consistency with models and with earlier estimates made using data from different surveys and applying different approaches. Our results confirm that below ~300{mu}Jy SFGs+RQ AGNs overtake RL AGNs that dominate at brighter flux densities. We also confirm earlier indications of a similar evolution of RQ AGNs and SFGs. Finally, we discuss the angular correlation function of our sources and highlight its sensitivity to the criteria used for the classification.</description><source format="bibcode">2021MNRAS.500...22B</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/500/22</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/MNRAS/481/4548">J/MNRAS/481/4548 : New constraints on the 1.4GHz source counts</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/500/22</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/500/22</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/500/22</mirrorURL></interface></capability><capability><interface xsi:type="vs:ParamHTTP"><accessURL use="base">https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/500/22</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/500/22</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/500/22</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/MNRAS/500/22/table2 (Source catalogue)</description><interface xsi:type="vs:ParamHTTP" role="std"><accessURL use="base">https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/500/22/table2?</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/500/22/table2?</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/500/22/table2?</mirrorURL><queryType>GET</queryType><resultType>text/xml+votable</resultType></interface><maxSR>180.0</maxSR><maxRecords>50000</maxRecords><verbosity>true</verbosity><testQuery><ra>163.1549</ra><dec>57.517</dec><sr>0.005555555555555556</sr></testQuery></capability><coverage><spatial>6/6069 6071 6112 6114</spatial><spectral>9.276497240453405e-25 9.276497240453405e-25</spectral><footprint ivo-id="ivo://ivoa.net/std/moc">https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/500/22?format=ascii</footprint><waveband>Millimeter</waveband><waveband>Radio</waveband></coverage><tableset><schema><name>default</name><table><name>J/MNRAS/500/22/table2</name><description>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>Name</name><description>Source name (LHWJHHMMSS+DDMMSS)</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType" arraysize="17*">char</dataType></column><column><name>RAJ2000</name><description>Right ascension (J2000)</description><unit>deg</unit><ucd>pos.eq.ra;meta.main</ucd></column><column><name>DEJ2000</name><description>Declination (J2000)</description><unit>deg</unit><ucd>pos.eq.dec;meta.main</ucd></column><column><name>Class</name><description>Source classification (1)</description><ucd>src.class</ucd><dataType xsi:type="vs:VOTableType" arraysize="6*">char</dataType></column><column><name>Classrel</name><description>Classification reliability (2)</description><unit>%</unit><ucd>stat.likelihood</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>z</name><description>? 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