J/ApJ/725/1792ivo://CDS.VizieR/J/ApJ/725/1792doi:10.26093/cds/vizier.17251792CDSBower G.C.Croft S.Keating G.Whysong D.Ackermann R.Atkinson S.,Backer D.Backus P.Barott B.Bauermeister A.Blitz L.Bock D.,Bradford T.Cheng C.Cork C.Davis M.De Boer D.Dexter M.Dreher J.,Engargiola G.Fields E.Fleming M.Forster R.J.Gutierrez-Kraybill C.,Harp G.R.Heiles C.Helfer T.Hull C.Jordan J.Jorgensen S.,Kilsdonk T.Law C.Van Leeuwen J.Lugten J.Macmahon D.Mcmahon P.,Milgrome O.Pierson T.Randall K.Ross J.Shostak S.Siemion A.,Smolek K.Tarter J.Thornton D.Urry L.Vitouchkine A.Wadefalk N.,Weinreb S.Welch J.Werthimer D.Williams P.K.G.Wright M.2017-10-09T13:33:55Z2012-08-27T15:55:17ZCDS support team

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

cds-question@unistra.frradio-continuum-emissionsurveysThe Pi GHz Sky Survey (PiGSS) is a key project of the Allen Telescope Array. PiGSS is a 3.1GHz survey of radio continuum emission in the extragalactic sky with an emphasis on synoptic observations that measure the static and time-variable properties of the sky. During the 2.5 year campaign, PiGSS will twice observe ~250000 radio sources in the 10000deg^2^ region of the sky with b>30{deg} to an rms sensitivity of ~1mJy. Additionally, sub-regions of the sky will be observed multiple times to characterize variability on timescales of days to years. We present here observations of a 10deg^2^ region in the Bootes constellation overlapping the NOAO Deep Wide Field Survey field. The PiGSS image was constructed from 75 daily observations distributed over a 4 month period and has an rms flux density between 200 and 250uJy. This represents a deeper image by a factor of 4-8 than we will achieve over the entire 10000deg^2^. We provide flux densities, source sizes, and spectral indices for the 425 sources detected in the image. We identify ~100 new flat-spectrum radio sources; we project that when completed PiGSS will identify 104 flat-spectrum sources. We identify one source that is a possible transient radio source. This survey provides new limits on faint radio transients and variables with characteristic durations of months.2010ApJ...725.1792Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/725/1792CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/87 : The Allen Telescope Array 20cm Survey (ATATS). I. (Croft+ 2010)VIII/71 : The FIRST Survey Catalog, Version 03Apr11 (Becker+ 2003)VIII/72 : CLASS survey of radio sources (Myers+, 2003)VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)VIII/40 : GB6 catalog of radio sources (Gregory+ 1996)J/A+A/535/A38 : Observations of NOAO Bootes field at 153MHz (Intema+, 2011)J/MNRAS/404/1005 : Deep 15GHz survey (9C continued) (Waldram+, 2010)J/ApJ/641/140 : Optical counterparts in the NDWFS Bootes field (Brand+, 2006)J/AJ/130/923 : Faint radio sources in the NOAO Bootes field (Wrobel+, 2005)J/AJ/123/1784 : 1.4 GHz imaging of the Bootes field (de Vries+, 2002)J/A+AS/131/303 : GHz-Peaked-Spectrum radio sources (Stanghellini+ 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/725/1792https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/725/1792http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/725/1792https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/725/1792https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/725/1792http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/725/1792GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/725/1792/table2 (PiGSS sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/725/1792/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/725/1792/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/725/1792/table2?GETtext/xml+votable180.050000true215.823934.702670.0055555555555555565/2286 2287 2628 2629 6/9139 9142 105609.276497240453405e-25 3.213643678408261e-24https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/725/1792?format=asciiRadiodefaultJ/ApJ/725/1792/table2PiGSS sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPiGSSSource name (JHHMMSS+DDMMSS)meta.id;meta.maincharprimaryRSimbad column added by the CDSmeta.ref.urlcharRAJ2000Right Ascension in decimal hours (J2000)degpos.eq.ra;meta.maine_RAJ2000Error in Right Ascensionarcsecstat.errorfloatDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.maine_DEJ2000Error in Declinationarcsecstat.error;pos.eq.decfloatamajMeasured Gaussian semi-major axisarcsecphys.angSize;srcfloatbminMeasured Gaussian semi-minor axisarcsecphys.angSize;srcfloatphiMeasured position angle {phi}degpos.posAngfloatamaj'Deconvolved Gaussian semi-major axisarcsecphys.angSize;srcfloatbmin'Deconvolved Gaussian semi-minor axisarcsecphys.angSize;srcfloatphi'Deconvolved position angle {phi}'degpos.posAngfloatFluxThe 3.1GHz flux densitymJyphot.flux.density;em.radio.1500-3000MHzfloate_FluxError in FluxmJystat.error;phot.fluxfloatRCatCross-match(es) with WSRT, NVSS and GB6 catalogs within 45"meta.ref.urlintnullableSEDPlot the spectrum with SPECFIND (Vollmer et al. 2009, Cat. VIII/85)meta.ref.urlcharJ/ApJ/725/1792/table4Radio matches to PiGSS sourcesPiGSSSource name (JHHMMSS+DDMMSS)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintS1400? Flux density at 1400MHz from de Vries et al. 2002, Cat. J/AJ/123/1784mJyphot.flux.density;em.radio.750-1500MHzfloatnullablea1400? Spectral index at 1400MHzspect.indexfloatnullablee_a1400? Error in a1400stat.errorfloatnullableSNVSS? NVSS catalog 1.4GHz flux density (Cat. VIII/65)mJyphot.flux.density;em.radio.750-1500MHzfloatnullableaNVSS? NVSS Spectral indexspect.indexfloatnullablee_aNVSS? Error in aNVSSstat.errorfloatnullableS4850? Flux density at 4850MHz from GB6 (Gregory et al., 1996, Cat. VIII/40)mJyphot.flux.density;em.radio.3-6GHzfloatnullablea4850? Spectral index at 4850MHzspect.indexfloatnullablee_a4850? Error in a4850stat.errorfloatnullable