J/ApJS/150/19ivo://CDS.VizieR/J/ApJS/150/19doi:10.26093/cds/vizier.21500019CDSKim D.-W.Cameron R.A.Drake J.J.Evans N.R.Freeman P.Gaetz T.J.,Ghosh H.Green P.J.Harnden F.R.JrKarovska M.Kashyap V.Maksym P.W.,Ratzlaff P.W.Schlegel E.M.Silverman J.D.Tananbaum H.D.,Vikhlinin A.A.Wilkes B.J.Grimes J.P.2017-07-10T06:22:15Z2008-12-17T17:29:20ZCDS support team

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

cds-question@unistra.frsurveysx-ray-sourcesThe Chandra Multiwavelength Project (ChaMP) is a wide-area (~14deg^2^) survey of serendipitous Chandra X-ray sources, aiming to establish fair statistical samples covering a wide range of characteristics (such as absorbed active galactic nuclei, high-z clusters of galaxies) at flux levels (fX~10^-15^ to 10^-14^erg/s/cm^2^) ) intermediate between the Chandra deep surveys and previous missions. We present the first ChaMP catalog, which consists of 991 near on-axis, bright X-ray sources obtained from the initial sample of 62 observations. The data have been uniformly reduced and analyzed with techniques specifically developed for the ChaMP and then validated by visual examination. To assess source reliability and positional uncertainty, we perform a series of simulations and also use Chandra data to complement the simulation study. The false source detection rate is found to be as good as or better than expected for a given limiting threshold. On the other hand, the chance of missing a real source is rather complex, depending on the source counts, off-axis distance (or PSF), and background rate. The positional error (95% confidence level) is usually less than 1" for a bright source, regardless of its off-axis distance, while it can be as large as 4" for a weak source (~20counts) at a large off-axis distance (Doff-axis>8'). We have also developed new methods to find spatially extended or temporary variable sources, and those sources are listed in the catalog.2004ApJS..150...19Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/150/19CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/150/19https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/150/19http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/150/19https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/150/19https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/150/19http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/150/19GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/150/19/xray (Properties of X-ray sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/150/19/xray?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/150/19/xray?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/150/19/xray?GETtext/xml+votable180.050000true4.49546616.5220750.0055555555555555566/247 2232 4124 4285 5027 5063 5069 5437 6252 6495 7178 7273 7280 7281 7308 7309 7508 7510 8043 8644 8673 8675 8707 9272 10387 10529 10692 10694 10743 10843 11101 11632 13511 16058 16059 16301 17472 18780 18782 19216 19218 19282 19283 19848 19849 22915 23076 23078 24759 24765 25100 25102 25675 25934 25956 26292 26753 26755 26756 26758 27009 27126 27127 30833 34104 34139 34533 34535 35623 35759 35770 36427 48389 48423 48452 49125https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/150/19?format=asciiX-raydefaultJ/ApJS/150/19/table3Source FlagsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintType[FXVO] Flag letter (1)src.classcharFlagFlag numbermeta.code.errorintComMeaning of the flagmeta.code.errorcharJ/ApJS/150/19/table6Energy Conversion FactorsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsIDChaMP X-ray source identification numbermeta.idintCCDIDThe CCD identification number (1)obs.fieldcharB-1.2B energy conversion factor for {Gamma}=1.2 (2)arith.factor;phys.energyfloatS-1.2S energy conversion factor for {Gamma}=1.2 (2)arith.factor;phys.energyfloatH-1.2H energy conversion factor for {Gamma}=1.2 (2)arith.factor;phys.energyfloatSc-1.2Sc energy conversion factor for {Gamma}=1.2 (2)arith.factor;phys.energyfloatHc-1.2Hc energy conversion factor for {Gamma}=1.2 (2)arith.factor;phys.energyfloatB-1.4B energy conversion factor for {Gamma}=1.4 (2)arith.factorfloatS-1.4S energy conversion factor for {Gamma}=1.4 (2)arith.factorfloatH-1.4H energy conversion factor for {Gamma}=1.4 (2)arith.factorfloatSc-1.4Sc energy conversion factor for {Gamma}=1.4 (2)arith.factorfloatHc-1.4Hc energy conversion factor for {Gamma}=1.4 (2)arith.factorfloatB-1.7B energy conversion factor for {Gamma}=1.7 (2)arith.factorfloatS-1.7S energy conversion factor for {Gamma}=1.7 (2)arith.factorfloatH-1.7H energy conversion factor for {Gamma}=1.7 (2)arith.factorfloatSc-1.7Sc energy conversion factor for {Gamma}=1.7 (2)arith.factorfloatHc-1.7Hc energy conversion factor for {Gamma}=1.7 (2)arith.factorfloatJ/ApJS/150/19/xrayProperties of X-ray sourcese_HRError in HRstat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCXOMPChaMP source position name in J2000meta.id;meta.maincharObsIDChaMP X-ray source identification numbermeta.idintCCDIDThe CCD identification number (1)obs.fieldintSNumSource number assigned by wavdetectmeta.idintRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainePosPositional error (see section 5)arcsecstat.errorfloatDoffThe off-axis distancearcmininstr.offsetfloatRadSource extraction radius (see section 3.3) (2)arcsecphys.angSizefloatEExpEffective exposurekstime.duration;obs.exposurefloatFlag1? Source flag (see table3.dat and section 3.5)meta.code.errorintnullableFlag2? Source flag (see table3.dat and section 3.5)meta.code.errorintnullableBNetNet 0.3-8.0keV counts (1)ctphot.count;em.X-raydoublee_BNetError in BNetctstat.errorfloatS1NetNet 0.3-0.9keV counts (1)ctphot.count;em.X-raydoublee_S1NetError in S1Netctstat.errorfloatS2NetNet 0.9-2.5keV counts (1)ctphot.count;em.X-raydoublee_S2NetError in S2Netctstat.errorfloatHNetNet 2.5-8.00keV counts (1)ctphot.count;em.X-raydoublee_HNetError in HNetctstat.errorfloatScNetNet 0.5-2.0keV counts (1)ctphot.count;em.X-raydoublee_ScNetError in ScNetctstat.errorfloatHcNetNet 2.0-8.0keV counts (1)ctphot.count;em.X-raydoublee_HcNetError in HcNetctstat.errorfloatBFluxThe 0.3-8.0keV flux in units of 10^-13^erg/s/cm^2^ (1)1e-16W.m**-2phot.flux;em.X-rayfloate_BFluxError in BFlux1e-16W.m**-2stat.errorfloatHRThe Hardness Ratio, (H-S)/(H+S) (1)phot.flux;arith.ratiofloatC21The C21 (log(S1/S2)) X-ray color (1) (2)phot.count;em.X-rayfloate_C21Error in C21stat.errorfloatC32The C32 (log(S2/H)) X-ray color (1) (2)phot.count;em.X-rayfloate_C32Error in C32stat.errorfloat