J/MNRAS/464/3357ivo://CDS.VizieR/J/MNRAS/464/3357doi:10.26093/cds/vizier.74643357CDSWhittam I.H.Green D.A.Jarvis M.J.Riley J.M.2024-08-16T20:19:31Z2017-01-27T13:50:43ZCDS support team

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

cds-question@unistra.frsurveysradio-sourcesradio-continuum-emissionWe present 610-MHz Giant Metrewave Radio Telescope observations of 0.84deg^2^ of the AMI001 field (centred on 00h23m10s, +31d53') with an rms noise of 18microJy/beam in the centre of the field. A total of 955 sources are detected, and 814 are included in the source count analysis. The source counts from these observations are consistent with previous work. We have used these data to study the spectral index distribution of a sample of sources selected at 15.7GHz from the recent deep extension to the Tenth Cambridge (10C) survey. The median spectral index, alpha, (where S{prop.to}nu^-alpha^^) between 0.08<S_15.7GHz/mJy<0.2 is 0.32+/-0.14, showing that star-forming galaxies, which have much steeper spectra, are not contributing significantly to this population. This is in contrast to several models, but in agreement with the results from the 10C ultra-deep source counts; the high-frequency sky therefore continues to be dominated by radio galaxies down to S_15.7GHz_=0.1mJy.2017MNRAS.464.3357Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/464/3357CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/464/3357https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/464/3357http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/464/3357https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/464/3357https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/464/3357http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/464/3357GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/464/3357/table1 (Source catalogue of 955 sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/464/3357/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/464/3357/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/464/3357/table1?GETtext/xml+votable180.050000true5.161208331.67851670.0055555555555555565/5084 6/20340 203424.0419025326745717e-25 4.0419025326745717e-25https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/464/3357?format=asciiRadiodefaultJ/MNRAS/464/3357/table1Source catalogue of 955 sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource name (HHMMSS+DDMMSS)meta.id;meta.maincharGroupGroup designation (group name followed by the number of components in the group in brackets)meta.id;phys.atmol.configurationcharRAJ2000Peak right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Peak declination (J2000)pos.eq.dec;meta.mainSpkPeak flux density at 610MHzmJyphot.flux.density;em.radio.400-750MHzfloate_SpkError in peak flux densitymJystat.errorfloatSintIntegrated flux density at 610MHzmJyphot.flux.density;em.radio.400-750MHzfloate_Sint? Error in integrated flux densitymJystat.errorfloatnullablemaj? Deconvolved source major axisarcsecphys.angSizefloatnullablemin? Deconvolved source minor axisarcsecphys.angSize;srcfloatnullabletheta? Deconvolved position angle, measured from North to Eastdegpos.posAngfloatnullableNoiseLocal rms noisemJy/beaminstr.det.noisefloatType[-EP] Source type (1)meta.codechar