J/ApJ/714/1689ivo://CDS.VizieR/J/ApJ/714/1689doi:10.26093/cds/vizier.17141689CDSGrant J.K.Taylor A.R.Stil J.M.Landecker T.L.Kothes R.Ransom R.R.,Scott D.2017-12-06T07:38:49Z2012-05-29T09:30:15ZCDS support team

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

cds-question@unistra.frradio-galaxiespolarimetryradio-continuum-emissionWe present results of deep polarization imaging at 1.4GHz with the Dominion Radio Astrophysical Observatory as part of the DRAO Planck Deep Fields project. This deep extragalactic field covers 15.16deg^2^ centered at RA(J2000)=16:14 and DE(J2000)=54:56, has an angular resolution of 42"x62" at the field center, and reaches a sensitivity of 55uJy/beam in Stokes I and 45uJy/beam in Stokes Q and U. We detect 958 radio sources in Stokes I of which 136 are detected in polarization. We present the Euclidean-normalized polarized differential source counts down to 400uJy. These counts indicate that sources have a higher degree of fractional polarization at fainter Stokes I flux density levels than for brighter sources, confirming an earlier result. We find that the majority of our polarized sources are steep-spectrum objects with a mean spectral index of -0.77, and there is no correlation between fractional polarization and spectral index. We also matched deep field sources to counterparts in the Faint Images of the Radio Sky at Twenty Centimeters catalog. Of the polarized sources, 77% show structure at the arcsecond scale whereas only 38% of the sources with no detectable polarization show such structure. The median fractional polarization for resolved sources is 6.8%, while it is 4.4% for compact objects. The polarized radio sources in our deep field are predominantly those sources which are resolved and show the highest degrees of fractional polarization, indicating that the lobe dominated structure may be the source of the highly polarized sources. These resolved radio galaxies dominate the polarized source counts at P_0_=(Q^2^+U^2^)^0.5^<3mJy.2010ApJ...714.1689Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/714/1689CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/255 : SWIRE ELAIS N1 Source Catalogs (Surace+, 2004)VIII/71 : The FIRST Survey Catalog, Version 03Apr11 (Becker+ 2003)VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)VIII/62 : The Westerbork Northern Sky Survey (Leiden, 1998)J/MNRAS/405/2243 : GMOS/WIYN spectroscopic catalogue (Trichas+, 2010)J/MNRAS/395/269 : ELAIS-N1 field 325MHz observations (Sirothia+, 2009)J/MNRAS/383/75 : Deep 610MHz survey of ELAIS-N1 sources (Garn+, 2008)J/ApJ/666/201 : Radio polarimetry of the ELAIS N1 field (Taylor+, 2007)J/MNRAS/371/1891 : GOODS ELAIS-N1 24um flux densities (Rodighiero+, 2006)J/MNRAS/358/333 : ELAIS optical ident. at 15um + 1.4GHz (Gonzalez-Solares+,J/AJ/129/1198 : SDSS quasars in SWIRE ELAIS N1 field (Hatziminaoglou+, 2005)J/MNRAS/343/293 : ELAIS deep X-ray survey. I. (Manners+, 2003)J/MNRAS/302/222 : ISO ELAIS 20cm VLA survey regions (Ciliegi+, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/714/1689https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/714/1689http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/714/1689https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/714/1689https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/714/1689http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/714/1689GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/714/1689/table1 (Polarized sources from the DRAO ELAIS N1 source catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/714/1689/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/714/1689/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/714/1689/table1?GETtext/xml+votable180.050000true240.069416753.662450.0055555555555555565/2537 2538 2539 6/9981 9983 10145 10146 10147 11521 115249.276497240453405e-25 9.276497240453405e-25https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/714/1689?format=asciiRadiodefaultJ/ApJ/714/1689/table1Polarized sources from the DRAO ELAIS N1 source cataloge_alpha? alpha uncertaintystat.error;pos.eq.rafloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDRAOSource name (JHHMMSS.ss+DDMMSS.ss)pos.eq.ra;arith.diffcharRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.maine_RAJ2000RAs uncertaintysstat.error;pos.eq.rafloatDEJ2000Degree of declination (J2000)pos.eq.dec;meta.maine_DEJ2000DEs uncertaintyarcsecstat.error;pos.eq.decfloatS1.4GHz peak flux densitymJyphot.flux.density;em.radio.750-1500MHzfloate_SS uncertaintymJystat.errorfloatP0Simmons & Stewart (1985A&A...142..100S) bias-corrected peak flux density P_0_ (1.4GHz)mJyphot.flux.density;em.radio.750-1500MHzfloate_P0P0 uncertaintymJystat.errorfloatPolPercentage polarization ({Pi}_0_)%phys.polarizationfloate_PolPol uncertainty%stat.errorfloatPA[-86/85] Polarization angle (1)degpos.posAng;phys.polarizationfloatl_alphaLimit flag on alphameta.code.error;pos.eq.racharalphaSpectral index {alpha}_1420-325_ (2)spect.indexfloatCl[RC ]? Resolved or Compact FIRST source (3)meta.code.classcharRadCross-match with Cat. J/ApJ/666/201 and other radio catalogs within 30"meta.ref.urlintnullableNEDSimbad column added by the CDSmeta.refchar