J/MNRAS/397/281ivo://CDS.VizieR/J/MNRAS/397/281doi:10.26093/cds/vizier.73970281CDSIbar E.Ivison R.J.Biggs A.D.Lal D.V.Best P.N.Green D.A.2024-07-09T20:15:30Z2011-05-31T09:32:28ZCDS support team

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

cds-question@unistra.frradio-galaxiesgalaxy-classification-systemsIn the run up to routine observations with the upcoming generation of radio facilities, the nature of sub-mJy radio population has been hotly debated. Here, we describe multi-frequency data designed to probe the emission mechanism that dominates in these faint radio sources. Our analysis is based on observations of the Lockman Hole using the Giant Metrewave Radio Telescope (GMRT) - the deepest 610-MHz imaging yet reported - together with 1.4-GHz imaging from the Very Large Array (VLA), well matched in resolution and sensitivity to the GMRT data: {sigma}_610_MHz~15uJy/beam, {sigma}_1.4GHz_~6uJy/beam, full width at half-maximum (FWHM) ~5arcsec. The GMRT and VLA data are cross-matched to obtain the radio spectral indices for the faint radio emitters.2009MNRAS.397..281Ihttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/397/281CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/329/482 : ROSAT Deep Survey in the Lockman Hole (Hasinger+, 1998)J/PASJ/53/445 : ASCA Deep survey in Lockman Hole Field (Ishisaki+, 2001)J/A+A/393/425 : Spectral analysis of Lockman Hole (Mainieri+, 2002)J/A+A/398/901 : VLA survey at 6 cm in the Lockman Hole (Ciliegi+, 2003)J/AJ/125/2521 : 2MASS6x survey of the Lockman Hole (Beichman+, 2003)J/AJ/128/1501 : CLASXS: X-ray catalog (Yang+, 2004)J/A+A/413/843 : Far IR survey in the Lockman Hole (Kawara+, 2004)J/A+A/427/23 : 14.3um survey in the Lockman Hole (Fadda+, 2004)J/A+A/427/773 : Lockman Hole ISOCAM 14.3{mu}m Deep Survey (Rodighiero+ 2004)J/A+A/434/801 : X-ray sources near Lockman Hole (Zappacosta+, 2005)J/A+A/444/79 : Lockman Hole brightest AGNs XMM observations (Mateos+, 2005)J/A+A/473/105 : Lockman Hole AGN variability with XMM (Mateos+, 2007)J/MNRAS/371/963 : Deep VLA survey in LH, HDFN, ELAIS N2 (Biggs+, 2007)J/A+A/487/475 : X-ray variability of AGNs in Lockman Hole (Papadakis+, 2008)J/A+A/479/283 : XMM observations of the Lockman Hole (Brunner+, 2008)J/MNRAS/387/1037 : 610-MHz survey of Lockman Hole with GMRT (Garn+, 2008)J/ApJS/185/433 : SWIRE/Chandra survey in Lockman Hole Field (Wilkes+, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/397/281https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/397/281http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/397/281https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/397/281https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/397/281http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/397/281GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/397/281/LHradio (Full sample of the radio sources found in the Lockman Hole field at at 610MHz (table 3) and 1.4GHz (table5))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/397/281/LHradio?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/397/281/LHradio?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/397/281/LHradio?GETtext/xml+votable180.050000true161.905333357.17936110.0055555555555555566/6047 6069 6090 6112https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/397/281?format=asciiOpticalRadiodefaultJ/MNRAS/397/281/LHradioFull sample of the radio sources found in the Lockman Hole field at at 610MHz (table 3) and 1.4GHz (table5)n_Class[(*2) ] Note on Class (3)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFreqFrequency (610MHz or 1.4GHz)MHzem.freqintnullableNameIAU name, LH610MHzJHHMMSS.s+DDMMSS (table3) or LH1.4GHzJHHMMSS.s+DDMMSS (table4)meta.id;meta.maincharm_Name[abc] Multiplicity index for components of double and triple sourcesmeta.code.multipcharRAJ2000Right ascension (J2000.0) (1)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0) (1)pos.eq.dec;meta.mainPNRPeak flux to local noise ratiostat.snrintBWSCBandwidth smearing correction (Sect. 3.2.1)instr.paramfloatSizeObserved maximum angular size (2)arcsecphys.angSize;stat.maxfloatPAOrientation angle (position angle) of the source with respect to Northdegpos.posAngintSIntegrated flux density at 610MHz (table3) or 1.4GHz (table4), from AIPS routine SADuJyphot.flux.density;em.radiointe_Srms uncertainty on SdensuJystat.errorintClassExtended or multiple classification code (3)meta.code.classcharl_alphaLimit flag on alphameta.code.error;pos.eq.racharalpha? Radio spectral index between 610MHz and 1.4GHz (4)spect.index;em.radio.400-750MHzfloatnullableE_alpha? Error on alpha (upper limit)stat.error;stat.maxfloatnullablee_alpha? Error on alpha (lower limit)stat.error;pos.eq.rafloatnullablef_alpha[!-] Flag for unreliable alpha (5)meta.codecharn_alphaSpectral flags (6)meta.notecharRadObervations at both frequenciesmeta.ref.urlchar