J/ApJ/740/65ivo://CDS.VizieR/J/ApJ/740/65doi:10.26093/cds/vizier.17400065CDSOfek E.O.Frail D.A.Breslauer B.Kulkarni S.R.Chandra P.Gal-Yam A.,Kasliwal M.M.Gehrels N.2018-02-12T08:45:34Z2013-03-04T09:37:18ZCDS support team

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

cds-question@unistra.frradio-continuum-emissionradio-sourcesWe present the results of a 5GHz survey with the Very Large Array (VLA) and the expanded VLA, designed to search for short-lived (<~1day) transients and to characterize the variability of radio sources at milli-Jansky levels. A total sky area of 2.66deg^2^, spread over 141 fields at low Galactic latitudes (b~6-8{deg}), was observed 16 times with a cadence that was chosen to sample timescales of days, months, and years. Most of the data were reduced, analyzed, and searched for transients in near real-time. Interesting candidates were followed up using visible light telescopes (typical delays of 1-2hr) and the X-ray Telescope on board the Swift satellite. The final processing of the data revealed a single possible transient with a peak flux density of f_{nu}_~2.4mJy. Furthermore, we use the data to measure the source variability on timescales of days to years, and we present the variability structure function of 5GHz sources.2011ApJ...740...65Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/740/65CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/87 : The Allen Telescope Array 20cm Survey (ATATS). I. (Croft+ 2010)J/ApJ/725/1792 : Pi Ghz Sky Survey (PiGSS). I. (Bower+, 2010)J/ApJ/704/652 : Radio transients in a 1.4GHz survey (Niinuma+, 2009)J/PASP/120/339 : Nasu Radio-Transient Search Project (Takefuji+, 2008)J/AJ/127/2565 : Faint FIRST variable radio sources (de Vries+, 2004)J/ApJS/91/347 : A 5-GHz VLA Survey of the Galactic Plane (Becker+ 1994)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/740/65https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/740/65http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/740/65https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/740/65https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/740/65http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/740/65GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/740/65/table6 (Master catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/740/65/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/740/65/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/740/65/table6?GETtext/xml+votable180.050000true283.771425-13.962506110.005555555555555556Cone search capability for table J/ApJ/740/65/table5 (Single epoch catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/740/65/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/740/65/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/740/65/table5?GETtext/xml+votable180.050000true282.95597-13.5023350.005555555555555556Cone search capability for table J/ApJ/740/65/table2 (List of survey pointings)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/740/65/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/740/65/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/740/65/table2?GETtext/xml+votable180.050000true282.94699-13.4550.0055555555555555565/3493 3504 7287 6/12929 12931 12932 12934 12935 12937 12940 12941 12946 12952 12953 12955 12956 13971 13977 14020 14135 14137 14139 14140 14141 14142 14178 14184 29147 29172 29173 29834 29835 29856 29857 298598.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/740/65?format=asciiRadiodefaultJ/ApJ/740/65/table6Master catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMseq[1/464] Source index in Master catalogmeta.id;meta.mainintFieldField name (HHMM+DDMM; J2000)obs.fieldcharRAJ2000Right Asecnsion in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainFpcCorrected peak specific fluxmJyphot.flux.density;em.radio.3-6GHzfloatFp[0.12/57.18] Peak specific flux uncorrected for beam attenuationmJyphot.flux.density;em.radio.3-6GHzfloate_Fp[0.04/0.13] Error in UncFmJystat.errorfloatFi/Fp[0.27/3.68] Integrated flux divided by peak fluxphot.flux;arith.ratiofloatLobe[0/1] SAD sidelobe warning flagmeta.codeintamaj[10/43] Source major axisarcsecphys.angSizefloatbmin[4/29] Source minor axisarcsecphys.angSize;srcfloatPA[0/180] Position angle of major axisdegpos.posAngfloatDC[0/91] Distance of source from beam centerarcminpos.angDistancefloatNobs[14/16] Number of observations of the fieldmeta.numberintNdet[0/16] Number of source detections in individual epochs by SADmeta.numberintChi2The {chi}^2^ measured from Single epochsstat.fit.chi2floatS/MFlux standard deviation in Single epochs divided by mean fluxstat.errorfloatChi2YThe {chi}^2^ measured from Yearly epochsstat.fit.chi2floatS/MYFlux standard deviation in Yearly epochs divided by mean fluxstat.errorfloatVR[1/7] Variability index V_R_ in Yearly epochs (1)src.var.indexfloatVF[0/1] Variability index V_F_ in Yearly epochs (1)src.var.indexfloatr(N)[0.1/14.5]? Distance from nearest NVSS source; 15" search radiusarcsecpos.angDistancefloatnullableFref? NVSS peak specific flux (Cat. VIII/65)mJyphot.flux.density;em.radio.750-1500MHzdoublenullablee_Fref? Error in NVSS peak specific fluxmJystat.errordoublenullablealpha[-1.12/3.53]? 1.4-4.9GHz spectral slope {alpha} defined by f_{nu}_{prop.to}{nu}^{alpha}^spect.indexfloatnullabler(U)[0.1/2]? Distance from nearest USNO-B1 source; 2" search radiusarcsecpos.angDistancefloatnullableBmag? USNO-B1 B2 magnitudemagphot.mag;em.opt.BfloatnullableRmag? USNO-B1 R2 magnitudemagphot.mag;em.opt.Rfloatnullabler(2M)[0.3/2]? Distance from nearest 2MASS source; 2" search radiusarcsecpos.angDistancefloatnullableJmag? 2MASS J-band magnitudemagphot.mag;em.IR.JfloatnullableHmag? 2MASS H-band magnitudemagphot.mag;em.IR.HfloatnullableKmag? 2MASS Ks-band magnitudemagphot.mag;em.IR.Kfloatnullablef2008Uncorrected peak flux in Yearly 2008 imagemJyphot.flux.density;em.radio.3-6GHzfloate_f2008Error in f2008mJystat.errorfloatf2010Uncorrected peak flux in Yearly 2010 imagemJyphot.flux.density;em.radio.3-6GHzfloate_f2010Error in f2010mJystat.errorfloatf1Uncorrected peak flux in Single epoch number 1mJyphot.flux.density;em.radio.3-6GHzfloate_f1Error in f1mJystat.errorfloatf2Uncorrected peak flux in Single epoch number 2mJyphot.flux.density;em.radio.3-6GHzfloate_f2Error in f2mJystat.errorfloatf3Uncorrected peak flux in Single epoch number 3mJyphot.flux.density;em.radio.3-6GHzfloate_f3Error in f3mJystat.errorfloatf4Uncorrected peak flux in Single epoch number 4mJyphot.flux.density;em.radio.3-6GHzfloate_f4Error in f4mJystat.errorfloatf5Uncorrected peak flux in Single epoch number 5mJyphot.flux.density;em.radio.3-6GHzfloate_f5Error in f5mJystat.errorfloatf6Uncorrected peak flux in Single epoch number 6mJyphot.flux.density;em.radio.3-6GHzfloate_f6Error in f6mJystat.errorfloatf7? Uncorrected peak flux in Single epoch number 7mJyphot.flux.density;em.radio.3-6GHzfloatnullablee_f7? Error in f7mJystat.errorfloatnullablef8Uncorrected peak flux in Single epoch number 8mJyphot.flux.density;em.radio.3-6GHzfloate_f8Error in f8mJystat.errorfloatf9Uncorrected peak flux in Single epoch number 9mJyphot.flux.density;em.radio.3-6GHzfloate_f9Error in f9mJystat.errorfloatf10Uncorrected peak flux in Single epoch number 10mJyphot.flux.density;em.radio.3-6GHzfloate_f10Error in f10mJystat.errorfloatf11Uncorrected peak flux in Single epoch number 11mJyphot.flux.density;em.radio.3-6GHzfloate_f11Error in f11mJystat.errorfloatf12Uncorrected peak flux in Single epoch number 12mJyphot.flux.density;em.radio.3-6GHzfloate_f12Error in f12mJystat.errorfloatf13? Uncorrected peak flux in Single epoch number 13mJyphot.flux.density;em.radio.3-6GHzfloatnullablee_f13? Error in f13mJystat.errorfloatnullablef14? Uncorrected peak flux in Single epoch number 14mJyphot.flux.density;em.radio.3-6GHzfloatnullablee_f14? Error in f14mJystat.errorfloatnullablef15Uncorrected peak flux in Single epoch number 15mJyphot.flux.density;em.radio.3-6GHzfloate_f15Error in f15mJystat.errorfloatf16? Uncorrected peak flux in Single epoch number 16mJyphot.flux.density;em.radio.3-6GHzfloatnullablee_f16? Error in f16mJystat.errorfloatnullableDataDetails of observations within 15''meta.ref.urlcharNVSSDisplay the NVSS data (Condon et al. 1998, Cat. VIII/65) within 15"meta.ref.urlcharODisplay the optical sources (USNO-B1 and 2MASS) within 2"meta.ref.urlcharJ/ApJ/740/65/table5Single epoch catalogEp[1/16] Epoch numbermeta.idintDataDetails of observations within 15''meta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/343] Source numbermeta.id;meta.mainintFieldField name (HHMM+DDMM; J2000)obs.fieldcharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainFpcCorrected peak specific fluxmJyphot.flux.density;em.radio.3-6GHzfloatFp[0.5/75.1] Peak specific flux uncorrected for beam attenuationmJyphot.flux.density;em.radio.3-6GHzfloate_Fp[0.08/0.41] Error in UncFmJystat.errorfloatFi/Fp[0.04/4.57] Integrated flux divided by peak fluxphot.flux;arith.ratiofloatEpochEpoch of observation (Julian Year)yrtime.epochdoubleamaj[7/69] Source major axisarcsecphys.angSizefloatbmin[1/27] Source minor axisarcsecphys.angSize;srcfloatPA[0/180] Position angle of major axisdegpos.posAngfloatDC[/10.5] Distance of source from beam centerarcminpos.angDistancefloatJ/ApJ/740/65/table2List of survey pointingsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField name (HHMM+DDMM; J2000)meta.id;meta.maincharprimaryRAJ2000Field right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Field declination (J2000)degpos.eq.dec;meta.mainNep[12/16] Number of epochsmeta.numberintJ/ApJ/740/65/table3List of the epochsNoiserms noiseuJystat.stdev;instr.det.noiseintEpEpoch numbermeta.idintprimaryObs[2008/2010] Mid-time observation year (UTC)stime.epochExpTime elapseddtime.expofloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNf[109/141] Number of observed fieldsmeta.id;obs.fieldintNs[151/363] Number of observed sourcesmeta.numberintGC[0.92/1.04] Gain correctioninstr.calibfloatCE[0/6] Cosmic error {epsilon}_cos_ (1)%stat.errorfloat