J/ApJS/188/178ivo://CDS.VizieR/J/ApJS/188/178doi:10.26093/cds/vizier.21880178CDSMorrison G.E.Owen F.N.Dickinson M.Ivison R.J.Ibar E.2017-12-07T07:27:00Z2010-07-14T18:40:59ZCDS support team

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

cds-question@unistra.frradio-sourcesradio-continuum-emissionWe describe deep, new, wide-field radio continuum observations of the Great Observatories Origins Deep Survey-North field. The resulting map has a synthesized beam size of ~1.7" and an rms noise level of ~3.9uJy/beam near its center and ~8uJy/beam at 15' from phase center. We have cataloged 1230 discrete radio emitters, within a 40'x40' region, above a 5{sigma} detection threshold of ~20uJy at the field center. New techniques, pioneered by Owen & Morrison, have enabled us to achieve a dynamic range of 6800:1 in a field that has significantly strong confusing sources. We compare the 1.4GHz (20cm) source counts with those from other published radio surveys. Our differential counts are nearly Euclidean below 100uJy with a median source diameter of ~1.2". This adds to the evidence presented by Owen & Morrison that the natural confusion limit may lie near 1uJy. If the Euclidean slope of the counts continues down to the natural confusion limit as an extrapolation of our logN-logS, this indicates that the cutoff must be fairly sharp below 1uJy else the cosmic microwave background temperature would increase above 2.7K at 1.4GHz.2010ApJS..188..178Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/188/178CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)J/AJ/112/1335 : Hubble Deep Field observations (Williams+ 1996)J/MNRAS/358/1159 : Radio sources in HDF and HFF (Muxlow+, 2005)J/MNRAS/371/963 : Deep VLA survey in Lockman Hole, HDFN, ELAISN2 (Biggs+ 2006)J/ApJS/167/103 : Radio/Optical catalog of the SSA 13 field (Fomalont+, 2006)J/AJ/136/1889 : 20cm observations of deep Swire Field (Owen+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/188/178https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/188/178http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/188/178https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/188/178https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/188/178http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/188/178GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/188/178/table2 (Radio source catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/188/178/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/188/178/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/188/178/table2?GETtext/xml+votable180.050000true188.490208362.41977780.0055555555555555566/11227 11230 11249 112529.276497240453405e-25 9.276497240453405e-25https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/188/178?format=asciiRadiodefaultJ/ApJS/188/178/table2Radio source catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[MOD2010][1/11103] Catalog Source Numbermeta.id;meta.mainintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.maine_RAJ2000Error in RAssstat.error;pos.eq.rafloatDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.maine_DEJ2000Error in DEsarcsecstat.error;pos.eq.decfloatS/NPeak Signal/Noise Ratiostat.snr;stat.maxfloatSpObserved peak brightness at 1.4GHz (1)uJyphot.flux.density;em.radio.750-1500MHzdoublee_SpError in SpuJystat.error;src.spTypefloatStotTotal flux density at 1.4GHzuJyphot.flux.density;em.radio.750-1500MHzdoublee_StotError in StotuJystat.errorfloatbmajFitted Gaussian major axis FWHMarcsecphys.angSize.smajAxisfloatbminFitted Gaussian minor axis FWHMarcsecphys.angSize.sminAxisfloatPAFitted position angledegpos.posAng;meta.modelledintulim? bmaj-upper limit if bmaj=0.0 (2)arcsecpos.angResolutionfloatnullablebeamMap beam sizearcsecphys.angSize;instr.beamfloatSimbadSimbad column added by the CDSchar