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<ri:Resource created="2007-08-17T12:43:28Z" 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>Extragalactic IRAS sources</title><shortName>J/AJ/109/2318</shortName><identifier>ivo://CDS.VizieR/J/AJ/109/2318</identifier><altIdentifier>doi:10.26093/cds/vizier.51092318</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Condon J.J.</name></creator><creator><name>Anderson E.</name></creator><creator><name>Broderick J.J.</name></creator><date role="Updated">2023-04-06T16:50:11Z</date><date role="Created">2007-08-17T12:43:28Z</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>infrared-sources</subject><subject>radio-sources</subject><description>Extragalactic sources detected at lambda=60um were selected from the IRAS Faint Source Catalog, Version 2 (Cat. II/156) by the criterion S(60um)&gt;=S(12um). They were identified by position coincidence with radio sources stronger than 25mJy at 4.85GHz in the 6.0sr declination band 0deg&lt;Dec.&lt;+75deg (excluding the 0.05sr region 12h40m&lt;R.A.&lt;14h40m, 0deg&lt;Dec.&lt;+5deg) and with radio sources stronger than 80mJy in the 3.4sr area 0h&lt;R.A.&lt;20h, -40deg&lt;Dec.&lt;0deg (plus the region 12h40m&lt;R.A.&lt;14h40m, 0deg&lt;Dec.&lt;+5deg). Fields containing new candidate identifications were mapped by the VLA at 4.86GHz with about 15" FWHM resolution. Difficult cases were confirmed or rejected with the aid of accurate (sigma~1") radio and optical positions. The final sample of 354 identifications in Omega=9.4sr is reliable and large enough to contain statistically useful numbers of radio-loud FIR galaxies and quasars. The logarithmic FIR/radio flux ratio parameter q can be used to distinguish radio sources powered by "starbursts" from those powered by "monsters." Starbursts and normal spiral galaxies in a lambda=60um flux-limited sample have a narrow (sigma_q=0.14+/-0.01) q distribution with mean &lt;q&gt;=2.74+/-0.01, and none have "warm" FIR spectra [{alpha}(25um, 60um)&lt;1.5]. The absence of radio-quiet (but not completely silent) blazars indicates that nearly all blazars become optically thin at frequencies {nu}&lt;~100GHz. Nonthermal sources with steep FIR/optical spectra and dust-embedded sources visible only at FIR and radio wavelengths must be very rare.</description><source format="bibcode">1995AJ....109.2318C</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/109/2318</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/II/156">II/156 : IRAS Faint Source Catalog, |b| &gt; 10, Version 2.0 (Moshir+ 1989)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/VIII/14">VIII/14 : 87GB Catalog of radio sources (Gregory et al., 1991)</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/AJ/109/2318</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/109/2318</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/109/2318</mirrorURL></interface></capability><capability><interface xsi:type="vs:ParamHTTP"><accessURL use="base">https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/109/2318</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/109/2318</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South 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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>IRAS</name><description>IRAS FSC2 name FHHMM.M+DDMM</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType" arraysize="11*">char</dataType><flag>primary</flag></column><column><name>RAB1950</name><description>IRAS FSC2 B1950 right ascension</description><ucd>pos.eq.ra;meta.main</ucd></column><column><name>DEB1950</name><description>IRAS FSC2 B1950 Declination</description><ucd>pos.eq.dec;meta.main</ucd></column><column><name>l_S12</name><description>[&lt; ] S12 upper limit symbol</description><ucd>meta.code.error</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>S12</name><description>IRAS 12 um flux density (1)</description><unit>Jy</unit><ucd>phot.flux.density;em.IR.8-15um</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>l_S25</name><description>[&lt; ] S25 upper limit symbol</description><ucd>meta.code.error</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>S25</name><description>IRAS 25 um flux density (1)</description><unit>Jy</unit><ucd>phot.flux.density;em.IR.15-30um</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>l_S60</name><description>[&lt; ] S60 upper limit symbol</description><ucd>meta.code.error</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>S60</name><description>IRAS 60 um flux density (1)</description><unit>Jy</unit><ucd>phot.flux.density;em.IR.30-60um</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>l_S100</name><description>[&lt; ] S100 upper limit symbol</description><ucd>meta.code.error</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>S100</name><description>IRAS 100 um flux density (1)</description><unit>Jy</unit><ucd>phot.flux.density;em.IR.60-100um</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>RA2</name><description>? Radio B1950 right ascension</description><ucd>pos.eq.ra</ucd><flag>nullable</flag></column><column><name>DE2</name><description>? Radio B1950 Declination</description><ucd>pos.eq.dec</ucd><flag>nullable</flag></column><column><name>S4.85GHz</name><description>? 4.85 GHz flux density (2)</description><unit>mJy</unit><ucd>phot.flux.density;em.radio.3-6GHz</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>IRASdata</name><description>Display the original IRAS data for this source</description><ucd>meta.ref.url</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>J/AJ/109/2318/table2</name><description>Optical data and derived quantities</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>IRAS</name><description>IRAS FSC2 name FHHMM.M+DDMM</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType" arraysize="11*">char</dataType></column><column><name>Name</name><description>Common name</description><ucd>meta.id.cross</ucd><dataType xsi:type="vs:VOTableType" arraysize="13*">char</dataType></column><column><name>RAB1950</name><description>? Optical B1950 right ascension</description><ucd>pos.eq.ra;meta.main</ucd><flag>nullable</flag></column><column><name>DEB1950</name><description>? Optical B1950 Declination</description><ucd>pos.eq.dec;meta.main</ucd><flag>nullable</flag></column><column><name>Type</name><description>Identification morphology from the UGC</description><ucd>src.morph.type</ucd><dataType xsi:type="vs:VOTableType" arraysize="8*">char</dataType></column><column><name>mp</name><description>? 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Radio spectral index between 1.4 and 5GHz</description><ucd>spect.index</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>l_alpIR</name><description>[&gt;] Lower limit symbol for alpIR</description><ucd>meta.code.error</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>alpIR</name><description>FIR spectral index between 25-60 um</description><ucd>spect.index</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>ES</name><description>Energy source: S=stars, M=monster</description><ucd>src.class</ucd><dataType xsi:type="vs:VOTableType" arraysize="5*">char</dataType></column><column><name>IRASdata</name><description>Display the original IRAS data for this source</description><ucd>meta.ref.url</ucd><dataType xsi:type="vs:VOTableType" arraysize="*">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></schema></tableset></ri:Resource>