J/MNRAS/443/2590ivo://CDS.VizieR/J/MNRAS/443/2590doi:10.26093/cds/vizier.74432590CDSSmolcic V.Ciliegi P.Jelic V.Bondi M.Schinnerer E.Carilli C.L.,Riechers D.A.Salvato M.Brkovic A.Capak P.Ilbert O.Karim A.,Mccracken H.Scoville N.Z.2024-08-10T20:18:15Z2015-07-28T14:36:14ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frradio-continuum-emissionradio-galaxiesWe present 90cm Very Large Array imaging of the COSMOS field, comprising a circular area of 3.14 square degrees at 8.0"x6.0" angular resolution with an average rms of 0.5mJy/beam. The extracted catalogue contains 182 sources (down to 5.5{sigma}), 30 of which are multicomponent sources. Using Monte Carlo artificial source simulations, we derive the completeness of the catalogue, and we show that our 90cm source counts agree very well with those from previous studies. Using X-ray, NUV-NIR and radio COSMOS data to investigate the population mix of our 90cm radio sample, we find that our sample is dominated by active galactic nuclei. The average 90-20cm spectral index (S_{nu}_{prop.to}{nu}^{alpha}^, where S_{nu}_ is the flux density at frequency {nu} and {alpha} the spectral index) of our 90cm selected sources is -0.70, with an interquartile range from -0.90 to -0.53. Only a few ultra-steep-spectrum sources are present in our sample, consistent with results in the literature for similar fields. Our data do not show clear steepening of the spectral index with redshift. Nevertheless, our sample suggests that sources with spectral indices steeper than -1 all lie at z>~1, in agreement with the idea that ultra-steep-spectrum radio sources may trace intermediate-redshift galaxies (z>~1).2014MNRAS.443.2590Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/443/2590CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/92 : The FIRST Survey Catalog, Version 2014Dec17 (Helfand+ 2015)J/AJ/128/1974 : The VLA-COSMOS survey. I. (Schinnerer+, 2004)J/ApJS/172/46 : The VLA-COSMOS survey. II. (Schinnerer+, 2007)J/ApJS/188/384 : The VLA-COSMOS survey. IV. (Schinnerer+, 2010)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/443/2590https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/443/2590http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/443/2590https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/443/2590https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/443/2590http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/443/2590GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/443/2590/catalog (90cm COSMOS source catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/443/2590/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/443/2590/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/443/2590/catalog?GETtext/xml+votable180.050000true149.196033332.129405830.0055555555555555565/6814 6/27245 27247 27344-273452.166724697358042e-25 9.932213363424795e-25https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/443/2590?format=asciiRadiodefaultJ/MNRAS/443/2590/catalog90cm COSMOS source catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCOSMOSVLA327 name (HHMMSS.ss+DDMMSS.s, J2000)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.maine_RAJ2000[0.3/1.1]? rms error on right ascension (1)arcsecstat.error;pos.eq.rafloatnullableDEJ2000Declination (J2000)pos.eq.dec;meta.maine_DEJ2000[0.4/1.1]? rms error on declination (1)arcsecstat.error;pos.eq.decfloatnullableFp[2/118]? 327MHz peak flux of source (in mJy/beam) (1)mJyphot.flux.density;em.radio.200-400MHzfloatnullablee_Fp[0.2/5.6]? rms uncertainty on peak flux (in mJy/beam) (1)mJystat.errorfloatnullableFt[2/683] 327MHz integrated source flux densitymJyphot.flux.density;em.radio.200-400MHzfloate_Ft[0.2/17]? rms uncertainty on FtmJystat.errorfloatnullablerms[0.3/6.3]? measured local rms at the radio source position (in mJy/beam)mJyinstr.det.noisefloatnullablebmaj[0/97] Deconvolved source major axis (2)arcsecphys.angSizefloatbmin[0/34] Deconvolved source minor axis (2)arcsecphys.angSize;srcfloatPA[0/180]? Position angle (3)degpos.posAngfloatnullableRes[0/1] 1=resolved source; 0=unresolved (2)meta.codeintMult[0/1] 1=multi-component source (1), 0=nometa.codeint20cm20cm sources from FIRST (VIII/92) or COSMOSVLADP (J/ApJS/188/384) within 10''meta.ref.urlintnullableRName20cm source name (4)meta.id.crosscharFp20? 20cm peak flux of source (in mJy/beam)mJyphot.flux.density;em.radio.750-1500MHzfloatnullableFt20? 20cm integrated source flux densitymJyphot.flux.density;em.radio.750-1500MHzfloatnullableSep[0/9]? 20cm-90cm sources separationarcsecpos;arith.difffloatnullable