J/other/PASA/42.ivo://CDS.VizieR/J/other/PASA/42.38doi:10.26093/cds/vizier/ds/eckdiCDSDuchesne S.Ross K.Thomson A.J.M.Lenc E.Murphy T.Galvin T.J.,Hotan A.W.Moss V.A.Whiting M.T.2026-03-20T20:03:01Z2025-05-26T10:02:39ZCDS support team

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

cds-question@unistra.frsurveysradio-sourcesradio-continuum-emissiongalaxy-classification-systemsWe have conducted a widefield, wideband, snapshot survey using the Australian SKA Pathfinder (ASKAP) referred to as the Rapid ASKAP Continuum Survey (RACS). RACS covers ~90% of the sky, with multiple observing epochs in three frequency bands sampling the ASKAP frequency range of 700-1800MHz. This work contains the catalogues from the third major epoch at 1655.5MHz, RACS-high. From the 1493 images covering the sky up to declination +48 degrees, we present a catalogue of 2677509 radio sources and 3526674 Gaussian components. The catalogue is constructed from images with a median root-mean-square noise of 195uJy/beam and a median angular resolution of 11.8" by 8.1". The overall reliability of the catalogue is estimated to be 99.18%, and we find a decrease in reliability as angular resolution improves. We estimate the brightness scale to be accurate to 10%, and the astrometric accuracy to be within ~0.6" in right ascension and ~0.7" in declination after correction of a systematic declination-dependent offset. All data products from RACS-high, including calibrated visibility datasets, images from individual observations, full- sensitivity mosaics, and the all-sky catalogue are available at the CSIRO ASKAP Science Data Archive: https://doi.org/10.25919/g3jd-av02.2025PASA...42...38Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/PASA/42.38CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/other/PASA/38.58 : Rapid ASKAP Continuum Survey. II. RACS cat. (Hale+, 2021)J/other/PASA/41.3 : Rapid ASKAP Continuum Survey. V. 1367.5MHzhttps://research.csiro.au/racs : RACS project websitehttps://doi.org/10.25919/g3jd-av02 : RACS-high collection on CASDAhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/PASA/42.38https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/PASA/42.38http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/PASA/42.38https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/PASA/42.38https://vizier.iucaa.in/viz-bin/votable?-source=J/other/PASA/42.38http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/PASA/42.38GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/PASA/42.38/sourcesh (RACS-high source or island catalogue (RACS-high_sources, table B1))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/PASA/42.38/sourcesh?https://vizier.iucaa.in/viz-bin/conesearch/J/other/PASA/42.38/sourcesh?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/PASA/42.38/sourcesh?GETtext/xml+votable180.050000true4.1419836.19840.005555555555555556Cone search capability for table J/other/PASA/42.38/gcompsh (RACS-high Gaussian component catalogue (RACS-high_components, table B2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/PASA/42.38/gcompsh?https://vizier.iucaa.in/viz-bin/conesearch/J/other/PASA/42.38/gcompsh?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/PASA/42.38/gcompsh?GETtext/xml+votable180.050000true4.1419836.19840.0055555555555555560/4-11 1/0 4 8 12 2/4 8 20 24 36 40 52 56 3/20-22 24-26 36-38 40-42 84-86 88-90 100-102 104-106 148-150 152-154 164-166 168-170 212-214 216-218 228-230 232-234 4/92 108 112 156 172 176 192 348 364 368 412 428 432 448 604 620 624 668 684 688 704 860 876 880 924 940 944 960 5/372 376 436 440 452 456 628 632 692 696 708 712 772 776 1396 1400 1460 1464 1476 1480 1652 1656 1716 1720 1732 1736 1796 1800 2420 2424 2484 2488 2500 2504 2676 2680 2740 2744 2756 2760 2820 2824 3444 3448 3508 3512 3524 3528 3700 3704 3764 3768 3780 3784 3844 3848 6/1492-1494 1496-1498 1508-1510 1512-1514 1748-1750 1752-1754 1764-1766 1768-1770 1812-1814 1816-1818 1828-1830 1832-1834 2516-2518 2520-2522 2532-2534 2536-2538 2772-2774 2776-2778 2788-2790 2792-2794 2836-2838 2840-2842 2852-2854 2856-2858 3092-3094 3096-3098 3108-3110 3112-3114 5588-5590 5592-5594 5604-5606 5608-5610 5844-5846 5848-5850 5860-5862 5864-5866 5908-5910 5912-5914 5924-5926 5928-5930 6612-6614 6616-6618 6628-6630 6632-6634 6868-6870 6872-6874 6884-6886 6888-6890 6932-6934 6936-6938 6948-6950 6952-6954 7188-7190 7192-7194 7204-7206 7208-7210 9684-9686 9688-9690 9700-9702 9704-9706 9940-9942 9944-9946 9956-9958 9960-9962 10004-10006 10008-10010 10020-10022 10024-10026 10708-10710 10712-10714 10724-10726 10728-10730 10964-10966 10968-10970 10980-10982 10984-10986 11028-11030 11032-11034 11044-11046 11048-11050 11284-11286 11288-11290 11300-11302 11304-11306 13780-13782 13784-13786 13796-13798 13800-13802 14036-14038 14040-14042 14052-14054 14056-14058 14100-14102 14104-14106 14116-14118 14120-14122 14804-14806 14808-14810 14820-14822 14824-14826 15060-15062 15064-15066 15076-15078 15080-15082 15124-15126 15128-15130 15140-15142 15144-15146 15380-15382 15384-15386 15396-15398 15400-154021.0969458533834315e-24 1.0969458533834315e-24https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/PASA/42.38?format=asciiOpticalRadiodefaultJ/other/PASA/42.38/sourceshRACS-high source or island catalogue (RACS-high_sources, table B1)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldIDField name, RACS_HHMM+DD (Field_ID)obs.fieldcharRAJ2000Right ascension (J2000) of the source (RA)degpos.eq.ra;meta.mainindexedDEJ2000Declination (J2000) of the source (Dec)degpos.eq.dec;meta.mainindexede_DCMajUncertainty in the deconvolved source major axis (E_DC_Maj_axis)arcsecstat.errordoublee_DCMinUncertainty in the deconvolved source minor axis (E_DC_Min_axis)arcsecstat.errordoublee_DCPAUncertainty in the deconvolved source PA (E_DC_PA)degstat.errordoubleNoiseLocal estimate of the root-mean-square noise (Noise)mJy/beaminstr.det.noisefloatTilelDirection cosine l of the source with respect to the field centre (Tile_l)degpos.dirCos;obs.fielddoubleDEdegcDeclination (J2000) of the source after declination-dependent offsets applied (Dec_corr)degpos.eq.dece_RAJ2000Uncertainty on right ascension from fitting the source position (E_RA)degstat.error;pos.eq.radoublee_DEJ2000Uncertainty on declination from fitting the source position (E_Dec)degstat.error;pos.eq.decdoublee_DEdegcUncertainty on corrected declination from fitting (E_Dec_corr)degstat.error;pos.eq.decdoubleFtotTotal flux density at 1655.5MHz of the source (Total_flux)mJyphot.flux.density;em.radio.1500-3000MHzdoublee_FtotPyUncertainty in the total flux density at 1655.5MHz from PyBDSF fitting (E_Total_flux_PyBDSF)mJystat.errordoublee_FtotQuadrature sum of the brightness scale and PyBDSF uncertainties for total flux density at 1655.5MHz (E_Total_flux)mJystat.errordoubleFpeakPeak flux density at 1655.5MHz of the source (Peak_flux)mJy/beamphot.flux.density;em.radio.1500-3000MHzdoublee_FpeakPyUncertainty in the peak flux density at 1655.5MHz from PyBDSF fitting (E_Peak_flux_PyBD)mJy/beamstat.errordoublee_FpeakQuadrature sum of the brightness scale and PyBDSF uncertainties for peak flux density at 1655.5MHz (E_Peak_flux)mJy/beamstat.errordoubleMajSize of the major axis of the source (Maj_axis)arcsecphys.angSizedoubleMinSize of the minor axis of the source (Min_axis)arcsecphys.angSize;srcdoublePAPosition angle of the source, east of north (PA)degpos.posAngdoublee_MajUncertainty in the source major axis (E_Maj_axis)arcsecstat.errordoublee_MinUncertainty in the source minor axis (E_Min_axis)arcsecstat.error;stat.mindoublee_PAUncertainty in the source PA (E_PA)degstat.errordoubleDCMajDeconvolved source major axis (DC_Maj_axis)arcsecphys.angSizedoubleDCMinDeconvolved source minor axis (DC_Min_axis)arcsecphys.angSize;srcdoubleDCPADeconvolved source PA (DC_PA)degpos.posAngdoubleTilemDirection cosine m of the source with respect to the field centre (Tile_m)degpos.dirCos;obs.fielddoubleTilesepAngular separation from the field centre (Tile_sep)degpos.angDistancedoublePSFMajMajor axis FWHM of the PSF for the field (PSF_Maj)arcsecphys.angSizefloatPSFMinMinor axis FWHM of the PSF for the field (PSF_Min)arcsecphys.angSizefloatPSFPAPA of the PSF for the field (PSF_PA)degpos.posAngfloatSCode[MS] Source structure classification by PyBDSF, S = single, M = multiple (S_Code)meta.codecharNGauss[1/77] Number of Gaussian components comprising the source (N_Gaussians)meta.numberintFlag[0/1] Source type flag, 0 = unresolved, 1 = resolved (Flag)meta.code.errorintNameSource name following IAU source name convention: RACS-MID1 JHHMMSS.s+DDMMSS (Name)meta.id;meta.maincharSourceIDUnique identifier based on the field the source is located in and the index assigned by PyBDSF, RACS_HHMM+DD_NNNN (Source_ID)meta.idcharJ/other/PASA/42.38/gcompshRACS-high Gaussian component catalogue (RACS-high_components, table B2)e_FpeakQuadrature sum of the brightness scale and PyBDSF uncertainties for peak flux density (E_Peak_flux)mJy/beamstat.errordoubleMajSize of the major axis of the source (Maj_axis)arcsecphys.angSizedoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaussIDUnique identifier based on the field the component is located in and the index assigned by PyBDSF (Gaussian_ID)meta.id;meta.maincharSourceIDUnique identifier based on the field the source is located in and the index assigned by PyBDSF (Source_ID)meta.idcharFieldIDField name: RACS_HHMM+DD (Field_ID)obs.fieldcharRAJ2000Right ascension (J2000) of the source (RA)degpos.eq.ra;meta.mainindexedDEJ2000Declination (J2000) of the source (Dec)degpos.eq.dec;meta.mainindexedDEdegcDeclination (J2000) of the source after declination-dependent offsets applied (Dec_corr)degpos.eq.dece_RAJ2000Uncertainty on right ascension from fitting the source position (E_RA)degstat.error;pos.eq.radoublee_DEJ2000Uncertainty on declination from fitting the source position (E_Dec)degstat.error;pos.eq.decdoublee_DEdegcUncertainty on corrected declination from fitting (E_Dec_corr)degstat.error;pos.eq.decdoubleFtotTotal flux density of the source (Total_flux)mJyphot.flux.density;em.radio.1500-3000MHzdoublee_FtotPyUncertainty in the total flux density from PyBDSF fitting (E_Total_flux_PyBDSF)mJystat.errordoublee_FtotQuadrature sum of the brightness scale and PyBDSF uncertainties for total flux density (E_Total_flux)mJystat.errordoubleFpeakPeak flux density of the source (Peak_flux)mJy/beamphot.flux.density;em.radio.1500-3000MHzdoublee_FpeakPyUncertainty in the peak flux density from PyBDSF fitting (E_Peak_flux_PyBDSF)mJy/beamstat.errordoubleMinSize of the minor axis of the source (Min_axis)arcsecphys.angSize;srcdoublePAPosition angle of the source, east of north (PA)degpos.posAngdoublee_MajUncertainty in the source major axis (E_Maj_axis)arcsecstat.errordoublee_MinUncertainty in the source minor axis (E_Min_axis)arcsecstat.error;stat.mindoublee_PAUncertainty in the source PA (E_PA)degstat.errordoubleDCMajDeconvolved source major axis (DC_Maj_axis)arcsecphys.angSizedoubleDCMinDeconvolved source minor axis (DC_Min_axis)arcsecphys.angSize;srcdoubleDCPADeconvolved source PA (DC_PA)deg**2pos.posAngdoublee_DCMajUncertainty in the deconvolved source major axis (E_DC_Maj_axis)arcsecstat.errordoublee_DCMinUncertainty in the deconvolved source minor axis (E_DC_Min_axis)arcsecstat.errordoublee_DCPAUncertainty in the deconvolved source PA (E_DC_PA)deg**2stat.errordoubleNoiseLocal estimate of the root-mean-square noise (Noise)mJy/beaminstr.det.noisefloatTilelDirection cosine l of the source with respect to the field centre (Tile_l)degpos.dirCos;obs.fielddoubleTilemDirection cosine m of the source with respect to the field centre (Tile_m)degpos.dirCos;obs.fielddoubleTilesepAngular separation from the field centre (Tile_sep)deg**2pos.angDistancedoublePSFMajMajor axis FWHM of the PSF for the field (PSF_Maj)arcsecphys.angSizefloatPSFMinMinor axis FWHM of the PSF for the field (PSF_Min)arcsecphys.angSizefloatPSFPAPA of the PSF for the field (PSF_PA)degpos.posAngfloatSCode[MS] Source structure classification by PyBDSF, S = single, M = multiple (S_Code)meta.codecharFlag[0/2] Source type flag, 0 = unresolved, 1 = resolved (Flag)meta.code.errorint