J/MNRAS/497/5383ivo://CDS.VizieR/J/MNRAS/497/5383doi:10.26093/cds/vizier.74975383CDSIshwara-Chandra C.H.Taylor A.R.Green D.A.Stil J.M.Vaccari M.,Ocran E.F.2024-08-21T20:15:47Z2023-10-31T14:52:09ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiradio-sourcesastrometryIn this paper, we present a wide-area 610-MHz survey of the ELAIS N1 field with the GMRT, covering an area of 12.8deg^2^ at a resolution of 6arcsec and with an rms noise of ~40{mu}Jy/beam. This is equivalent to ~20{mu}Jy/beam rms noise at 1.4GHz for a spectral index of -0.75. The primary goal of the survey was to study the polarized sky at sub-mJy flux densities at <GHz frequencies, along with a range of other science goals such as investigations into the nature of the low-frequency {mu}Jy source populations and alignments of radio jets. A total of 6400 sources were found in this region, the vast majority of them compact. The sample jointly detected by GMRT at 610MHz and by VLA FIRST at 1.4GHz has a median spectral index of -0.85+/-0.05 and a median 610-MHz flux density of 4.5mJy. This region has a wealth of ancillary data, which is useful to characterize the detected sources. The multiwavelength crossmatching resulted optical/IR counterparts to ~90 per cent of the radio sources, with a significant fraction having at least photometric redshift. Due to the improved sensitivity of this survey over preceding ones, we have discovered six giant radio sources (GRSs), with three of them at z~1 or higher. This implies that the population of GRS may be more abundant and common than known to date and if true, this has implications for the luminosity function and the evolution of radio sources. We have also identified several candidate-extended relic sources.2020MNRAS.497.5383Ihttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/497/5383CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/497/5383https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/497/5383http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/497/5383https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/497/5383https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/497/5383http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/497/5383GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/497/5383/tables1 (GMRT ELAIS N1 wide 610-MHz source catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/497/5383/tables1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/497/5383/tables1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/497/5383/tables1?GETtext/xml+votable180.050000true240.1670155.786760.0055555555555555565/2537-2539 2880 6/10145-10147 10168 11524-11526https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/497/5383?format=asciiRadiodefaultJ/MNRAS/497/5383/tables1GMRT ELAIS N1 wide 610-MHz source catalogueSIIntegrated Stokes I flux densitymJyphys.polarization.stokesfloate_SIError on SImJystat.errorfloatSpPeak Stokes I intensitymJyphys.polarization.stokesfloate_SpError on SpmJy/beamstat.error;src.spTypefloatRMSRMS at the source position returned by PyBDSFmJy/beaminstr.det.noisefloatthetamajDimension of the fitted major axis of 2D Gaussianarcsecphys.angSize.smajAxisfloate_thetamajError on thetamajarcsecstat.errorfloatthetaminDimension of the fitted minor axis of 2D Gaussianarcsecphys.angSize.sminAxisfloate_thetaminError on thetaminarcsecstat.errorfloatPAPosition angle of the source major axis with respect to northdegpos.posAngfloate_PAError on PAdegstat.errorfloatCodeSource classification code, as in (Mohan & Rafferty 2015ascl.soft02007M)meta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource name (JHHMMSS-DDMMSS)meta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.maine_RAJ2000Error on RAdegarcsecstat.error;pos.eq.rafloatDEJ2000Declination (J2000)degpos.eq.dec;meta.maine_DEJ2000Error on DEdegarcsecstat.error;pos.eq.decfloat