J/MNRAS/406/1853ivo://CDS.VizieR/J/MNRAS/406/1853doi:10.26093/cds/vizier.74061853CDSGawronski M.P.Peel M.W.Lancaster K.Battye R.A.Birkinshaw M.,Browne I.W.A.Davies M.L.Davis R.J.Feiler R.Franzen T.M.O.,Genova-santos R.Kus A.J.Lowe S.R.Pazderska B.M.Pazderski E.,Pooley G.G.Roukema B.F.Waldram E.M.Wilkinson P.N.2024-07-11T20:17:05Z2011-03-04T13:40:28ZCDS support team

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

cds-question@unistra.frradio-sourcesSmall angular scale (high multipole order l) studies of cosmic microwave background (CMB) anisotropies require accurate knowledge of the statistical properties of extragalactic sources at cm-mm wavelengths. We have used a 30GHz dual-beam receiver (One Centimetre Receiver Array prototype) on the Torun 32-m telescope to measure the flux densities of 121 sources in Very Small Array fields selected at 15GHz with the Ryle Telescope. We have detected 57 sources above a limiting flux density of 5mJy, of which 31 sources have a flux density greater than 10mJy, which is our effective completeness limit. From these measurements we derive a surface density of sources above 10mJy at 30GHz of 2.2+/-0.4deg^-2^. This is consistent with the surface density obtained by Mason et al. who observed a large sample of sources selected at a much lower frequency (1.4GHz). We have also investigated the dependence of the spectral index distribution on flux density by comparing our results with those for sources above 1Jy selected from the Wilkinson Microwave Anisotropy Probe 22GHz catalogue.2010MNRAS.406.1853Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/406/1853CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/406/1853https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/406/1853http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/406/1853https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/406/1853https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/406/1853http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/406/1853GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/406/1853/table1 (Sources in the VSA fields)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/406/1853/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/406/1853/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/406/1853/table1?GETtext/xml+votable180.050000true2.94462528.50641670.0055555555555555565/2469 2787 6/795 798 816-817 819-820 822 4957 5634-5635 5640-5641 9875 11147 11169 11172 20297-20299 20302 20320-20321 203249.276497240453405e-25 1.987820871092403e-23https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/406/1853?format=asciiRadiodefaultJ/MNRAS/406/1853/table1Sources in the VSA fieldsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource name (JHHMM+DDMMa)meta.id;meta.maincharn_Name[)] for components of a single sourcemeta.notecharl_S1.4Limit flag on S1.4meta.code.errorcharS1.4Flux density ay 1.4GHzmJyphot.flux.density;em.radio.750-1500MHzfloate_S1.4? rms uncertainty on S1.4mJystat.errorfloatnullableS4.8? Flux density at 4.8GHzmJyphot.flux.density;em.radio.3-6GHzintnullablee_S4.8? rms uncertainty on S4.8mJystat.errorintnullablen_S4.8[a] Note (2)meta.notecharS15Flux density at 15GHzmJyphot.flux.density;em.radio.12-30GHzfloatS30Flux density at 30GHzmJyphot.flux.density;em.mm.30-50GHzfloate_S30rms uncertainty on S30mJystat.errorfloatl_alphaLimit flag on spectral index {alpha}meta.code.error;pos.eq.racharalpha? Spectral index between 30GHz and 1.4GHzspect.index;em.mm.30-50GHzfloatnullableE_alpha? Error on {alpha} (upper limit)stat.error;stat.maxfloatnullablee_alpha? Error on {alpha} (lower limit)stat.error;pos.eq.rafloatnullableflag[ve ] variable/extended flag (3)meta.code.errorcharNote[*] indicates a note in notes.dat filemeta.notecharNVSSDisplay the NVSS data (Condon et al. 1998, Cat. VIII/65)meta.ref.urlcharSEDPlot the spectrum with SPECFIND (Vollmer et al. 2009, Cat. VIII/85)meta.ref.urlcharRAJ2000Right ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Declination (J2000) (1)pos.eq.dec;meta.mainJ/MNRAS/406/1853/notesIndividual notesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoteText of the notemeta.notecharNameSource namemeta.id;meta.mainchar