J/MNRAS/461/4151ivo://CDS.VizieR/J/MNRAS/461/4151doi:10.26093/cds/vizier.74614151CDSCarroll P.A.Line J.Morales M.F.Barry N.Beardsley A.P.,Hazelton B.J.Jacobs D.C.Pober J.C.Sullivan I.S.Webster R.L.,Bernardi G.Bowman J.D.Briggs F.Cappallo R.J.Corey B.E.,De Oliveira-Costa A.Dillon J.S.Emrich D.Ewall-Wice A.Feng L.,Gaensler B.M.Goeke R.Greenhill L.J.Hewitt J.N.Hurley-Walker N.,Johnston-Hollitt M.Kaplan D.L.Kasper J.C.Kim HS.Kratzenberg E.,Lenc E.Loeb A.Lonsdale C.J.Lynch M.J.Mckinley B.Mcwhirter S.R.,Mitchell D.A.Morgan E.Neben A.R.Oberoi D.Offringa A.R.Ord S.M.,Paul S.Pindor B.Prabu T.Procopio P.Riding J.Rogers A.E.E.,Roshi A.Udaya Shankar N.Sethi S.K.Srivani K.S.Subrahmanyan R.,Tegmark M.Thyagarajan N.Tingay S.J.Trott C.M.Waterson M.,Wayth R.B.Whitney A.R.Williams A.Williams C.L.Wu C.Wyithe J.S.B.2024-08-16T20:18:01Z2018-03-15T12:02:29ZCDS support team

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

cds-question@unistra.frsurveysradio-sourcesDetection of the epoch of reionization HI signal requires a precise understanding of the intervening galaxies and AGN, both for instrumental calibration and foreground removal. We present a catalogue of 7394 extragalactic sources at 182MHz detected in the RA=0 field of the Murchison Widefield Array Epoch of Reionization observation programme. Motivated by unprecedented requirements for precision and reliability we develop new methods for source finding and selection. We apply machine learning methods to self-consistently classify the relative reliability of 9490 source candidates. A subset of 7466 are selected based on reliability class and signal-to-noise ratio criteria. These are statistically cross-matched to four other radio surveys using both position and flux density information. We find 7369 sources to have confident matches, including 90 partially resolved sources that split into a total of 192 sub-components. An additional 25 unmatched sources are included as new radio detections. The catalogue sources have a median spectral index of -0.85. Spectral flattening is seen towards lower frequencies with a median of -0.71 predicted at 182MHz. The astrometric error is 7-arcsec compared to a 2.3-arcmin beam FWHM. The resulting catalogue covers ~1400deg^2^ and is complete to approximately 80mJy within half beam power. This provides the most reliable discrete source sky model available to date in the MWA EoR0 field for precision foreground subtraction.2016MNRAS.461.4151Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/461/4151CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/16 : Molonglo Reference Catalogue of Radio Sources (Large+ 1991)VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)VIII/81 : Sydney University Molonglo Sky Survey (SUMSS V2.1) (Mauch+ 2008)VIII/97 : 74MHz VLA Low-frequency Sky Survey Redux (VLSSr) (Lane+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/461/4151https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/461/4151http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/461/4151https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/461/4151https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/461/4151http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/461/4151GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/461/4151/kgs (KGS catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/461/4151/kgs?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/461/4151/kgs?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/461/4151/kgs?GETtext/xml+votable180.050000true349.97466306-22.108713890.0055555555555555562/64 3/260 262 264-265 4/1044 1046 1065 1068-1069 1072-1074 2219 2223 2903 2909 2911 2933 2935 5/4188 4208-4210 4214 4216-4218 4256-4257 4281-4282 4285 4302 4304 4306 4308 4320 8875 8881-8884 8886-8887 8889-8891 8928-8930 8934 8936-8937 8939-8940 8942-8943 8952 8954 11607 11609-11610 11621 11629 11632-11633 11635 11641-11643 11717 11728 11731 11737 11765 6/16721-16723 16728 16730 16732 16758 16760 16762-16764 16767 16844 16846-16850 16852 16855 16861 16863 16876 16878-16882 16884-16886 16888 16890-16891 17032-17034 17036-17037 17039 17056 17060-17061 17063 17065 17068 17072 17074 17076-17077 17080-17081 17084-17086 17121 17123 17133 17135-17136 17138 17144-17146 17148 17150 17201-17204 17206-17207 17212-17213 17215 17220-17221 17223 17228 17230-17231 17237 17248 17250 17252 17254 17264 17284-17286 17288 17290-17294 17296-17297 17299 17304-17306 17316 17319 17346 17441 17443 17450-17451 17539 17544-17545 17547 17576 18437 18448-18449 18505 35427 35429 35431 35434 35439 35442-35443 35446-35449 35451 35453-35455 35467 35477 35479 35481-35482 35484-35486 35491-35493 35495 35498-35499 35521 35523 35540-35542 35553-35555 35608 35616-35617 35619 35621-35622 35625-35627 35629-35631 35644 35724 35726-35728 35730-35732 35734-35735 35740 35742-35743 35752 35754-35755 35764-35766 35779 35786-35788 35812-35814 35821-35823 35833-35834 46399 46417-46419 46421-46423 46425-46427 46444-46445 46447 46483 46491 46494 46512 46525-46527 46537-46539 46561-46563 46864 46867 46873 46875-46878 46900 46909 46911 46916-46917 46919 46921 46923 46944-46946 46952-46953 46955-46957 47040 47045 47047 47053 47057-47059 47064-47065 47071 47091-47092 47095 471004.903291545219051e-26 9.276497240453405e-25https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/461/4151?format=asciiRadiodefaultJ/MNRAS/461/4151/kgsKGS cataloguerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource name (KGS JHHMMSS+DDMMSS)meta.id;meta.maincharRAJ2000Corrected mean J2000 right ascension of the snapshot detectiondegpos.eq.ra;meta.mainDEJ2000Corrected mean J2000 declination of the snapshot detectiondegpos.eq.dec;meta.maine_RAJ2000Standard deviation of the measured right ascensionarcsecstat.error;pos.eq.radoublee_DEJ2000Standard deviation of the measured declinationarcsecstat.error;pos.eq.decdoubleS182Weighted mean integrated 182MHz flux densityJyphot.flux.density;em.radio.100-200MHzdoublee_S182Standard deviation of the measured flux density at 183MHzJystat.errordoubleEBcorrEstimated flux density correction factor for Eddington Biasarith.factor;phot.fluxdoubleRClass[0/9] Reliability classification (1)meta.code.qualfloatBeam[0/1] Mean relative beam response at the source locationmeta.notefloatNdetNumber of snapshots the source was detected inmeta.numberintMatchType of match (2)meta.codecharFlag[0-2] Inspected flag (3)meta.code.errorcharRAMdeg? J2000 right ascension of the catalogue match to NVSS or SUMSSdegpos.eq.ranullableDEMdeg? J2000 declination of the catalogue match to NVSS or SUMSSdegpos.eq.decnullablee_RAMdeg? Uncertainty in right ascension of the NVSS or SUMSS catalogue matcharcsecstat.errorfloatnullablee_DEMdeg? Uncertainty in declination of the NVSS or SUMSS catalogue matcharcsecstat.errorfloatnullableSI? Spectral index {alpha} from a power-law spectral index fit S{prop.to}{nu}^{alpha}^ to all catalogue matchesspect.indexfloatnullablee_SI? Error on the spectral index parameterstat.errorfloatnullableS74? Flux density at 74MHz of the VLSSr (Cat. VIII/97) catalogue matchJyphot.flux.density;em.radio.20-100MHzfloatnullablee_S74? VLSSr flux density errorJystat.errorfloatnullableS408? Flux density at 408MHz of the MRC (Cat. VIII/16) catalogue matchJyphot.flux.density;em.radio.200-400MHzfloatnullablee_S408? MRC flux density errorJystat.errorfloatnullableS843? Flux density at 843MHz of the SUMSS (Cat. VIII/81) catalogue matchJyphot.flux.density;em.radio.750-1500MHzfloatnullablee_S843? SUMSS flux density errorJystat.errorfloatnullableS1400? Flux density at 1.4GHz of the NVSS (Cat. VIII/65) catalogue matchJyphot.flux.density;em.radio.750-1500MHzfloatnullablee_S1400? NVSS flux densityJystat.errorfloatnullableVLSSrVLSSr (VIII/97) source name (JHHMMSS+DDMMSS)meta.idcharMRCMRC (VIII/16) source name (HHMM+DDd)meta.idcharSUMSSSUMSS (VIII/81) source name (JHHMMSS+DDMMSS)meta.idcharNVSSNVSS (VIII/65) source name (HHMMSS+DDMMSS)meta.idchar