J/MNRAS/509/2150ivo://CDS.VizieR/J/MNRAS/509/2150doi:10.26093/cds/vizier.75092150CDSHeywood I.Jarvis M.J.Hale C.L.Whittam I.H.Bester H.L.Hugo B.,Kenyon J.S.Prescott M.Smirnov O.M.Tasse C.Afonso J.M.Best P.N.,Collier J.D.Deane R.P.Frank B.S.Hardcastle M.J.Knowles K.,Maddox N.Murphy E.J.Prandoni I.Randriamampandry S.M.Santos M.G.,Sekhar S.Tabatabaei F.Taylor A.R.Thorat K.2024-11-29T20:16:48Z2024-10-11T09:51:05ZCDS support team

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

cds-question@unistra.frsurveysgalaxiesradio-continuum-emissionradio-sourcesastrometryphotometryspectroscopyMIGHTEE is a galaxy evolution survey using simultaneous radio continuum, spectropolarimetry, and spectral line observations from the South African MeerKAT telescope. When complete, the survey will image ~20 deg2 over the COSMOS, E-CDFS, ELAIS-S1, and XMM-Newton Large Scale Structure field (XMM-LSS) extragalactic deep fields with a central frequency of 1284 MHz. These were selected based on the extensive multiwavelength data sets from numerous existing and forthcoming observational campaigns. Here, we describe and validate the data processing strategy for the total intensity continuum aspect of MIGHTEE, using a single deep pointing in COSMOS (1.6 deg^2^) and a three-pointing mosaic in XMM-LSS (3.5 deg^2^). The processing includes the correction of direction-dependent effects, and results in thermal noise levels below 2 {mu}Jy.beam^-1^ in both fields, limited in the central regions by classical confusion at ~8 arcsec angular resolution, and meeting the survey specifications. We also produce images at ~5 arcsec resolution that are ~3 times shallower. The resulting image products form the basis of the Early Science continuum data release for MIGHTEE. From these images we extract catalogues containing 9896 and 20274 radio components in COSMOS and XMM-LSS, respectively. We also process a close-packed mosaic of 14 additional pointings in COSMOS and use these in conjunction with the Early Science pointing to investigate methods for primary beam correction of broad-band radio images, an analysis that is of relevance to all full-band MeerKAT continuum observations, and wide-field interferometric imaging in general. A public release of the MIGHTEE Early Science continuum data products accompanies this article.2022MNRAS.509.2150Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/509/2150CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/602/A1 : VLA-COSMOS 3 GHz Large Project (Smolcic+, 2017)J/MNRAS/429/1652 : XMM-LSS catalogue. Version II. (Chiappetti+, 2013)J/ApJ/910/105 : VLA Frontier Fields survey for 3 MACS clustersJ/MNRAS/481/4548 : New constraints on the 1.4GHz source counts (Prandoni+,2018)VIII/100 : GaLactic and Extragalactic All-sky MWA surveyJ/A+A/598/A104 : LOFAR Two-metre Sky Survey (Shimwell+, 2017)https://doi.org/10.48479/emmd-kf31 : The image and catalogue productshttps://github.com/IanHeywood/oxkat : The data processing scriptshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/509/2150https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/509/2150http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/509/2150https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/509/2150https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/509/2150http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/509/2150GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/509/2150/cosmosl1 (*COSMOS Level-1 Early Science radio component catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/509/2150/cosmosl1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/509/2150/cosmosl1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/509/2150/cosmosl1?GETtext/xml+votable180.050000true150.836412.158820.005555555555555556Cone search capability for table J/MNRAS/509/2150/xmmlssl1 (*XMM-LSS Level-1 Early Science radio component catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/509/2150/xmmlssl1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/509/2150/xmmlssl1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/509/2150/xmmlssl1?GETtext/xml+votable180.050000true36.559-4.888130.0055555555555555565/4422 6814 6/17677 17679 17682-17683 17692 17694 17712-17713 27245 27247https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/509/2150?format=asciiRadiodefaultJ/MNRAS/509/2150/cosmosl1*COSMOS Level-1 Early Science radio component cataloguerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension (RA) (J2000) (G1)degpos.eq.ra;meta.maine_RAJ2000Mean 1{sigma} positional uncertainty of right ascension (E_RA) (G1)degstat.error;pos.eq.radoubleDEJ2000Declination (DEC) (J2000) (G1)degpos.eq.dec;meta.maine_DEJ2000Mean 1{sigma} positional uncertainty of declination (E_DEC) (G1)degstat.error;pos.eq.decdoubleSnuIntegrated flux density at an given effective frequency {nu}_eff_ (S_INT) (G2)Jyphot.flux.density;em.radio.750-1500MHzdoublee_SnuMean 1{sigma} uncertainty of S_{nu}_ (E_S_INT)Jystat.errordoublee_PAMean 1{sigma} uncertainty of PA (E_IM_PA)degstat.errorfloatThetaMThe major axis of the deconvolved source size (THETA_MAJ) (G6)degphys.angSizedoublee_ThetaMMean 1{sigma} uncertainty of {Theta}_M_ (E_THETA_MAJ)degstat.errordoubleThetamThe minor axis of the deconvolved source size (THETA_MIN) (G6)degphys.angSizedoublee_ThetamMean 1{sigma} uncertainty of {Theta}_m_ (E_THETA_MIN)degstat.errordoubleResResolved flag (equal to 1) if it satisfies our criterion (RESOLVED) (G7)meta.codeintRMSnoiseAverage background rms noise around the component estimated by PYBDSF (ISL_RMS)Jy/beamstat.stdev;instr.det.noise;meta.modelleddoubleIDgaussA unique identifier for the Gaussian component from the raw PYBDSF output (GAUS_ID)meta.idintIDsrcA unique identifier for the source from the raw PYBDSF output (SRC_ID)meta.idintIDislA unique identifier for the island from the raw PYBDSF output (ISL_ID)meta.idintIDRadio component identifier name in form JHHMMSS.SS+/-DDMMSS.S (NAME)meta.id;meta.maincharSpeakThe peak brightness at {nu}_eff_ (S_PEAK)Jy/beamphot.flux.density;em.radio.750-1500MHzdoublee_SpeakMean 1{sigma} uncertainty of S_peak_ (E_S_PEAK)Jy/beamstat.errordoublenueffObservational effective frequency (NU_EFF) (G3)Hzem.freqS1.4Integrated flux density corrected to 1.4 GHz assuming {nu}_eff_ values (S_INT14) (G4)Jyphot.flux.density;em.radio.750-1500MHzdoublee_S1.4Mean 1{sigma} uncertainty of S1.4 (E_S_INT14)Jystat.errordoubleSpeak1.4The peak brightness corrected to 1.4 GHz assuming {nu}_eff_ values (S_PEAK14) (G4)Jy/beamphot.flux.density;em.radio.750-1500MHzdoublee_Speak1.4Mean 1{sigma} uncertainty of Speak1.4 (E_S_PEAK14)Jy/beamstat.errordoubleMajAxisThe major axis of the 2D Gaussian fitted to the source by PYBDSF (IM_MAJ) (G5)degphys.angSize;meta.modelleddoublee_MajAxisMean 1{sigma} uncertainty of MajAxis (E_IM_MAJ)degstat.error;phys.angSizedoubleMinAxisThe minor axis of the 2D Gaussian fitted to the source by PYBDSF (IM_MIN) (G5)degphys.angSize;meta.modelleddoublee_MinAxisMean 1{sigma} uncertainty of MinAxis (E_IM_MIN)degstat.error;phys.angSizedoublePAThe position angle measured east of north (IM_PA)degpos.posAngfloatJ/MNRAS/509/2150/xmmlssl1*XMM-LSS Level-1 Early Science radio component cataloguerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDRadio component identifier name in form JHHMMSS.SS+/-DDMMSS.S (NAME)meta.id;meta.maincharRAJ2000Right Ascension (RA) (J2000) (G1)degpos.eq.ra;meta.mainindexede_RAJ2000Mean 1{sigma} positional uncertainty of right ascension (E_RA) (G1)degstat.error;pos.eq.radoubleDEJ2000Declination (DEC) (J2000) (G1)degpos.eq.dec;meta.mainindexede_DEJ2000Mean 1{sigma} positional uncertainty of declination (E_DEC) (G1)degstat.error;pos.eq.decdoubleSnuIntegrated flux density at an given effective frequency {nu}_eff_ (S_INT) (G2)Jyphot.flux.density;em.radio.750-1500MHzdoublee_SnuMean 1{sigma} uncertainty of S_{nu}_ (E_S_INT)Jystat.errordoubleSpeakThe peak brightness at {nu}_eff_ (S_PEAK)Jy/beamphot.flux.density;em.radio.750-1500MHzdoublee_SpeakMean 1{sigma} uncertainty of S_peak_ (E_S_PEAK)Jy/beamstat.errordoublenueffObservational effective frequency (NU_EFF) (G3)Hzem.freqS1.4Integrated flux density corrected to 1.4 GHz assuming {nu}_eff_ values (S_INT14) (G4)Jyphot.flux.density;em.radio.750-1500MHzdoubleThetaMThe major axis of the deconvolved source size (THETA_MAJ) (G6)degphys.angSizedoublee_ThetaMMean 1{sigma} uncertainty of {Theta}_M_ (E_THETA_MAJ)degstat.errordoubleThetamThe minor axis of the deconvolved source size (THETA_MIN) (G6)degphys.angSizedoublee_ThetamMean 1{sigma} uncertainty of {Theta}_m_ (E_THETA_MIN)degstat.errordoubleResResolved flag (equal to 1) if it satisfies our criterion (RESOLVED) (G7)meta.codeintRMSnoiseAverage background rms noise around the component estimated by PYBDSF (ISL_RMS)Jy/beamstat.stdev;instr.det.noise;meta.modelleddoubleIDgaussA unique identifier for the Gaussian component from the raw PYBDSF output (GAUS_ID)meta.idintIDsrcA unique identifier for the source from the raw PYBDSF output (SRC_ID)meta.idintIDislA unique identifier for the island from the raw PYBDSF output (ISL_ID)meta.idinte_S1.4Mean 1{sigma} uncertainty of S1.4 (E_S_INT14)Jystat.errordoubleSpeak1.4The peak brightness corrected to 1.4 GHz assuming {nu}_eff_ values (S_PEAK14) (G4)Jy/beamphot.flux.density;em.radio.750-1500MHzdoublee_Speak1.4Mean 1{sigma} uncertainty of Speak1.4 (E_S_PEAK14)Jy/beamstat.errordoubleMajAxisThe major axis of the 2D Gaussian fitted to the source by PYBDSF (IM_MAJ) (G5)degphys.angSize;meta.modelleddoublee_MajAxisMean 1{sigma} uncertainty of MajAxis (E_IM_MAJ)degstat.error;phys.angSizedoubleMinAxisThe minor axis of the 2D Gaussian fitted to the source by PYBDSF (IM_MIN) (G5)degphys.angSize;meta.modelleddoublee_MinAxisMean 1{sigma} uncertainty of MinAxis (E_IM_MIN)degstat.error;phys.angSizedoublePAThe position angle measured east of north (IM_PA)degpos.posAngfloate_PAMean 1{sigma} uncertainty of PA (E_IM_PA)degstat.errorfloat