J/MNRAS/441/2555ivo://CDS.VizieR/J/MNRAS/441/2555doi:10.26093/cds/vizier.74412555CDSHales C.A.Norris R.P.Gaensler B.M.Middelberg E.Chow K.E.,Hopkins A.M.Huynh M.T.Lenc E.Mao M.Y.2026-01-13T19:07:23Z2015-05-27T08:10:25ZCDS support team

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

cds-question@unistra.frsurveysgalaxiescatalogsradio-sourcesThis is the first of two papers describing the second data release (DR2) of the Australia Telescope Large Area Survey at 1.4GHz, which comprises deep wide-field observations in total intensity, linear polarization, and circular polarization over the Chandra Deep Field-South and European Large Area Infrared Space Observatory Survey-South 1 regions. DR2 improves upon the first data release by maintaining consistent data reductions across the two regions, including polarization analysis, and including differential number counts in total intensity and linear polarization. Typical DR2 sensitivities across the mosaicked multipointing images are 30{mu}Jy/beam at approximately 12"x6" resolution over a combined area of 6.4deg^2^. In this paper we present detailed descriptions of our data reduction and analysis procedures, including corrections for instrumental effects such as positional variations in image sensitivity, bandwidth smearing with a non-circular beam, and polarization leakage, and application of the BLOBCAT source extractor. We present the DR2 images and catalogues of components (discrete regions of radio emission) and sources (groups of physically associated radio components). We describe new analytic methods to account for resolution bias and Eddington bias when constructing differential number counts of radio components.2014MNRAS.441.2555Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/441/2555CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/253 : Chandra Deep Field South: multi-colour data (Wolf+, 2008)J/A+A/451/881 : ESIS BVR catalog, ELAIS-S1 (Berta+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/441/2555https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/441/2555http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/441/2555https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/441/2555https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/441/2555http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/441/2555GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/441/2555/tablea1 (ATLAS 1.4GHz DR2 component catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/441/2555/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/441/2555/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/441/2555/tablea1?GETtext/xml+votable180.050000true7.40902306-43.496308060.005555555555555556Cone search capability for table J/MNRAS/441/2555/tableb1 (ATLAS 1.4GHz DR2 source catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/441/2555/tableb1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/441/2555/tableb1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/441/2555/tableb1?GETtext/xml+votable180.050000true7.408625-43.496638890.0055555555555555565/8983 6/35385 35387-35388 35390 35473 35475-35476 35931 35953 35956-35958 36106 361289.276497240453405e-25 6.185923063528282e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/441/2555?format=asciiRadiodefaultJ/MNRAS/441/2555/tablea1ATLAS 1.4GHz DR2 component cataloguerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDComponent identification number (1)meta.idcharCComponent number (1 to 6) in table B1meta.ref.urlintnullableATLAS2Full component name (JHHMMSS.ss+DDMMSS.sA) (2)meta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.maine_RAJ2000Error in right ascensionarcsecstat.error;pos.eq.rafloatDEJ2000Declination (J2000)degpos.eq.dec;meta.maine_DEJ2000Error in declinationarcsecstat.error;pos.eq.decfloatSNR[5/9500] Signal to noise ratio of raw detectionstat.snrfloatrms[0.01/0.1] Local rms noise value (in mJy/beam)mJystat.stdev;instr.det.noisefloatbws[0.8/1] Local bandwidth smearing valuestat.fit.paramfloatSpeak[0.1/964] Peak 1.4GHz surface brightness corrected for bandwidth smearing (in mJy/beam)mJyphot.flux.density;em.radio.750-1500MHzfloate_Speak[0.01/50] Error in peak surface brightness (in mJy/beam)mJystat.errorfloatSint[0.08/1068] Integrated surface brightnessmJyphot.flux.density;em.radio.750-1500MHzdoublee_SintError in integrated surface brightnessmJystat.errorfloatVarea[0/1] Visibility areaphys.areafloatl_thetaLimit flag on theta (upper bound)meta.code.error;pos.posAngchartheta[0/50] Deconvolved angular size or upper boundarcsecphys.angSizefloate_theta? Error in deconvolved angular sizearcsecstat.error;pos.posAngfloatnullableSML[0.1/1068] Deboosted flux densitymJyphot.flux.density;em.radio.750-1500MHzdoubleJ/MNRAS/441/2555/tableb1ATLAS 1.4GHz DR2 source catalogueBI? Group B total intensity flux densitymJyphot.flux.density;em.radio.750-1500MHzdoublenullablee_BI? Group B error in total intensity flux densitymJystat.errorfloatnullableBL? Group B linearly polarised flux densitymJyphot.flux.densityfloatnullablee_BL? Group B error in linearly polarised flux densitymJystat.errorfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCompDisplay the components from tablea1meta.ref.urlcharIDSource identification number (1)meta.idcharATLAS2Full component name (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharI1? ID of total intensity component 1 (2)meta.id.assoccharI2? ID of total intensity component 2 (2)meta.id.assoccharI3? ID of total intensity component 3 (2)meta.id.assoccharI4? ID of total intensity component 4 (2)meta.id.assoccharI5? ID of total intensity component 5 (2)meta.id.assoccharI6? ID of total intensity component 6 (2)meta.id.assoccharL1? ID of inear polarisation component 1 (2)meta.id.assoccharL2? ID of inear polarisation component 2 (2)meta.id.assoccharL3? ID of inear polarisation component 3 (2)meta.id.assoccharGr.A? Group A classifications (3)meta.code.classlongnullableNANumber of source in this Gr.Ameta.numberintnullableGr.B? Group B classifications (3)meta.code.classlongnullableNBNumber of source in this Gr.Bmeta.numberintnullableGr.C? Group C classifications (3)meta.code.classlongnullableNCNumber of source in this Gr.Cmeta.numberintnullableAI? Group A total intensity flux densitymJyphot.flux.density;em.radio.750-1500MHzdoublenullablee_AI? Group A error in total intensity flux densitymJystat.errorfloatnullableAL? Group A linearly polarised flux densitymJyphot.flux.densityfloatnullablee_AL? Group A error in linearly polarised flux densitymJystat.errorfloatnullableCI? Group C total intensity flux densitymJyphot.flux.density;em.radio.750-1500MHzfloatnullablee_CI? Group C error in total intensity flux densitymJystat.errorfloatnullableCL? Group C linearly polarised flux densitymJyphot.flux.densityfloatnullablee_CL? Group C error in linearly polarised flux densitymJystat.errorfloatnullableSWIRE3SWIRE-DR3 cross-matched source (JHHMMSS.ss+DDMMSS.s)meta.id.assoccharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainI[0.1/1355] Total intensity 1.4GHz flux density of sourcemJyphot.flux.density;em.radio.750-1500MHzdoublee_IError in total intensity flux density of sourcemJystat.errorfloatl_LLimit flag on L (upper bound)meta.code.errorcharL[0.1/59] Linearly polarised flux density of source or upper boundmJyphot.flux.densityfloate_L? Error in linearly polarised flux density of sourcemJystat.errorfloatnullableS3.6? SWIRE 3.6{mu}m flux densityuJyphot.mag;em.IR.3-4umdoublenullableS4.5? SWIRE 4.5{mu}m flux densityuJyphot.mag;em.IR.4-8umdoublenullableS5.8? SWIRE 5.8{mu}m flux densityuJyphot.flux.density;em.IR.4-8umdoublenullableS8.0? SWIRE 8.0{mu}m flux densityuJyphot.flux.density;em.IR.8-15umdoublenullableS24? SWIRE 24.0{mu}m flux densityuJyphot.flux.density;em.IR.15-30umdoublenullableCl[0/9] Source classification: 0=AGN, 1=SFG (Star-Forming Galaxy), 2=star, 9=unknownmeta.code.classint