J/ApJ/582/615ivo://CDS.VizieR/J/ApJ/582/615doi:10.26093/cds/vizier.15820615CDSNandra K.Georgantopoulos I.Ptak A.Turner T.J.2017-11-10T11:15:22Z2004-04-25T16:52:38ZCDS support team

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

cds-question@unistra.frx-ray-sourcesWe present the SHEEP survey for serendipitously detected hard X-ray sources in ASCA GIS images. In a survey area of ~40deg^2^, 69 sources were detected in the 5-10keV band to a limiting flux of ~10^-13^ergs/cm^2^/s. The number counts agree with those obtained by the similar BeppoSAX High-Energy Large Area Survey (HELLAS), and both are in close agreement with ASCA and BeppoSAX 2-10keV surveys. Spectral analysis of the SHEEP sample reveals that the 2-10 and 5-10keV surveys do not sample the same populations, however, as we find considerably harder spectra, with an average {Gamma}~1.0, assuming no absorption.2003ApJ...582..615Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/582/615CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/327/771 : BeppoSAX HELLAS survey. II. (Fiore+, 2001)J/A+A/370/900 : BeppoSAX HELLAS survey. IV (Vignali+, 2001)J/ApJ/570/100 : BeppoSAX HELLAS survey. V. (La Franca+, 2002)J/ApJ/518/656 : ASCA Large Sky Survey (Ueda+, 1999)J/ApJS/133/1 : GIS catalog project : source catalog (Ueda+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/582/615https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/582/615http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/582/615https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/582/615https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/582/615http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/582/615GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/582/615/table1 (The SHEEP Sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/582/615/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/582/615/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/582/615/table1?GETtext/xml+votable180.050000true6.57916710.8444440.005555555555555556Cone search capability for table J/ApJ/582/615/table3 (Catalog and Literature Identifications)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/582/615/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/582/615/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/582/615/table3?GETtext/xml+votable180.050000true40.71625-23.4427780.0055555555555555566/2214 2340 5367 5439 5500 5985 7214 7323 7857 8288 8675 8681 8906 8912 8913 8915 8927 9164 9443 9496 9711 9959 10364 10599 10774 10788 11461 11614 11615 16058 16059 17623 17629 18112 18114 18207 19569 23143 25338 27714 27715 27721 27767 27918 27945 28334 28517 34038 34534 34669 35240 36075 36323 43784 45222 47941 48692https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/582/615?format=asciiX-raydefaultJ/ApJ/582/615/table2ROSAT Observations of SHEEP SourcesRXJROSAT designationmeta.id.crosscharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSHEEPSHEEP designationmeta.id;meta.maincharSeqROSAT sequence or catalogmeta.idcharExpTimeROSAT exposure timekstime.duration;obs.exposurefloattheta? Off-axis anglearcmininstr.offsetfloatnullableOffset? Offset from ACSA positionarcminpos.angDistancefloatnullablel_RateLimit flag on Ratemeta.code.errorcharRatePSPC or HRI count rate in the 0.1-2keV bandct/sphot.count;em.X-raydoublee_Rate? rms uncertainty on Ratect/sstat.errordoublenullableNHGalactic hydrogen column density1e+21cm**-2phys.columnDensityfloatl_FluxLimit flag on Fluxmeta.code.errorcharFluxFlux in the 0.1-2keV band1e-16W.m**-2phot.fluxfloatJ/ApJ/582/615/table5Spectral Fits to Sources with S/N > 10DOFDegrees of freedomstat.fit.dofintNameOther namemeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSHEEPSHEEP designationmeta.id;meta.maincharNHGalactic hydrogen column density1e+21cm**-2phys.columnDensityfloatE_NHError on NH (Upper limit)1e+21cm**-2stat.errorfloate_NHError on NH (Lower limit)1e+21cm**-2stat.errorfloatSp-IndexSpectral index Sp-Indexspect.indexfloatE_Sp-IndexError on Sp-Index (Upper limit)stat.errorfloate_Sp-IndexError on Sp-Index (Lower limit)stat.errorfloatFX(2-10)Flux in the 2-10keV band1e-15W.m**-2phot.fluxfloatFX(5-10)Flux in the 5-10keV band1e-15W.m**-2phot.fluxfloatChi2Chi^2^ valuestat.fit.paramfloatJ/ApJ/582/615/table1The SHEEP SamplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSHEEPSHEEP designation(JHHMM.m+DDMM)meta.id;meta.maincharprimaryRA2000ASCA Right ascension (2000)pos.eq.ra;meta.mainDE2000ASCA Declination (2000)pos.eq.dec;meta.mainS/NSignal-to-noise ratio (equivalent sigma)stat.snrfloatRawTotal GIS2+GIS3 counts in the 5-10keV band divided by total exposure (GIS2+GIS3)0.0001count.s**-1phot.count;em.X-rayfloate_Rawrms uncertainty on Raw0.0001count.s**-1stat.errorfloatRateHard-band (5-10keV) count rate corrected to on-axis value for a single GIS detector0.0001count.s**-1phot.count;em.X-rayfloate_Raterms uncertainty on Rate0.0001count.s**-1stat.errorfloatHMMedium hardness ratio (HM=H-M/H+M) (1)phot.flux;arith.ratiofloatE_HMError on HM (Upper limit)stat.errorfloate_HMError on HM (Lower limit)stat.errorfloatHSSoft hardness ratio (HS=H-S/H+S) (1)phot.flux;arith.ratiofloatE_HSError on HS (Upper limit)stat.errorfloate_HSError on HS (Lower limit)stat.errorfloatSeqSequence number in which this source was detectedmeta.idintExpTimeTotal GIS+GIS3 exposure time for sequencekstime.duration;obs.exposurefloatJ/ApJ/582/615/table3Catalog and Literature IdentificationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSHEEPSHEEP designationmeta.id;meta.maincharNameOther name from NEDmeta.idcharRA2000NED Right ascension (2000)pos.eq.ra;meta.mainDE2000NED Declination (2000)pos.eq.dec;meta.mainClassClassification (1)src.classcharz? Redshfitsrc.redshiftfloatnullableOffsetOffset from ROSAT positionarcminpos.angDistancefloatRadio[YN] Known radio source ?meta.codecharIR[YN] Known infrared source ?meta.codecharRefReference code (2)meta.refintNEDSimbad column added by the CDSmeta.refchar