J/ApJS/169/401ivo://CDS.VizieR/J/ApJS/169/401doi:10.26093/cds/vizier.21690401CDSKim M.Kim D.-W.Wilkes B.J.Green P.J.Kim E.Anderson C.S.,Barkhouse W.A.Evans N.R.Ivezic Z.Karovska M.Kashyap V.L.Lee M.G.,Maksym P.Mossman A.E.Silverman J.D.Tananbaum H.D.2026-01-20T12:13:13Z2009-10-13T12:10:18ZCDS support team

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

cds-question@unistra.frsurveysx-ray-sourcesWe present the Chandra Multiwavelength Project (ChaMP) X-ray point source catalog with ~6800 X-ray sources detected in 149 Chandra observations covering ~10deg^2^. The full ChaMP catalog sample is 7 times larger than the initial published ChaMP catalog. The exposure time of the fields in our sample ranges from 0.9 to 124ks, corresponding to a deepest X-ray flux limit of f_0.5-8.0_=9x10^-16^ergs/cm^2^/s. The ChaMP X-ray data have been uniformly reduced and analyzed with ChaMP-specific pipelines and then carefully validated by visual inspection. The ChaMP catalog includes X-ray photometric data in eight different energy bands as well as X-ray spectral hardness ratios and colors. To best utilize the ChaMP catalog, we also present the source reliability, detection probability, and positional uncertainty.2007ApJS..169..401Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/169/401CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-)VIII/28 : Bell Laboratories H I Survey (Stark+ 1992)J/ApJS/150/19 : ChaMP. I. First X-ray source catalog (Kim+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/169/401https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/169/401http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/169/401https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/169/401https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/169/401http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/169/401GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/169/401/ChaMP (Main and supplementary ChaMP catalog of X-ray point sources (tables 5, 6, 8, 9, 10 and 11 of paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/169/401/ChaMP?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/169/401/ChaMP?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/169/401/ChaMP?GETtext/xml+votable180.050000true4.29051516.434570.005555555555555556Cone search capability for table J/ApJS/169/401/table1 (List of ChaMP fields)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/169/401/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/169/401/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/169/401/table1?GETtext/xml+votable180.050000true4.6362516.5011110.0055555555555555565/8942 6/247 686 2052 2232 4124-4125 4285 4376 4378 5027 5063 5069 5074 5080 5090 5437-5439 5922-5923 6252-6253 6255 6495 7178 7273 7280-7281 7308-7309 7508 7510 8043 8046 8123 8126 8288 8644 8673 8675 8707 8908-8909 8912 8914-8915 8920-8921 9175 9180-9181 9272 10051 10386-10387 10451 10454 10529 10692 10694 10743 10759 10765 10843 10877 10879 10911 10954 10992 11048 11050 11101 11203-11204 11206 11347 11353 11632 11634 11665 11667 11670 11791 11802 12025 12028 13511 13517 13522 15033 15036 16058-16059 16301 16312 17472 17812-17813 17840 17899 18022 18032 18034 18054-18055 18060 18073 18076 18078 18099 18241 18466 18772 18780 18782 19033 19036 19216 19218 19282-19283 19842 19846-19849 22733 22735 22913 22915 22918 23076 23078 23339 23342 24758-24759 24764-24765 25100 25102 25675 25847 25853 25934 25944-25945 25950 25956 26019-26020 26022 26125 26280-26281 26292-26293 26753 26755-26756 26758 26876-26877 26990 27009 27076 27093 27095 27126-27127 27132-27133 27729 27732-27733 27762 27865 27868 27936 27938 27963 28049 28359 28365 28370 28376 28479 30833 31259 31310 31313 31315 31379 34104 34139 34533-34535 35246 35588 35623 35759 35896-35897 36217 36427 46078-46079 47375 47386 48388-48389 48423 48452-48454 48483 48498 48503 48614 49125 49127https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/169/401?format=asciiX-raydefaultJ/ApJS/169/401/ChaMPMain and supplementary ChaMP catalog of X-ray point sources (tables 5, 6, 8, 9, 10 and 11 of paper)n_CXOMPmeta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCXOMPChaMP source position name in J2000 (CXOMP JHHMMSS.s+DDMMSS in Simbad)meta.id;meta.maincharObsIDObservation identification numbermeta.idintCCDThe CCD identification numbermeta.idintSrcSource number assigned by wavdetect (G2)meta.idintRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainePosPositional uncertainty (G3)arcsecstat.errorfloatu_ePos[:] Uncertainty flag on ePosmeta.code.errorcharOAAOff axis angle (G4)arcmininstr.offsetfloatRadSource radius (1)arcsecphys.angSize;srcfloatExpEffective exposure time (2)kstime.duration;obs.exposurefloatFlagSource extraction flag, detailed in table4.datmeta.code.errorcharBNet? Net counts in the 0.3-8keV band (1)ctphot.count;em.X-raydoublenullablee_BNet? Error in CNet (1)ctphot.count;em.X-rayfloatnullableS1Net? Net counts in the 0.3-0.9keV band (1)ctphot.count;em.X-raydoublenullablee_S1Net? Error in S1Net (1)ctphot.count;em.X-rayfloatnullableS2Net? Net counts in the 0.9-2.5keV band (1)ctphot.count;em.X-raydoublenullablee_S2Net? Error in S2Net (1)ctphot.count;em.X-rayfloatnullableSNet? Net counts in the 0.3-2.5keV band (1)ctphot.count;em.X-raydoublenullablee_SNet? Error in SNet (1)ctphot.count;em.X-rayfloatnullableHNet? Net counts in the 2.5-8keV band (1)ctphot.count;em.X-raydoublenullablee_HNet? Error in HNet (1)ctphot.count;em.X-rayfloatnullableBcNet? Net counts in the 0.5-8keV band (1)ctphot.count;em.X-raydoublenullablee_BcNet? Error in BcNet (1)ctphot.count;em.X-rayfloatnullableScNet? Net counts in the 0.5-2keV band (1)ctphot.count;em.X-raydoublenullablee_ScNet? Error in ScNet (1)ctphot.count;em.X-rayfloatnullableHcNet? Net counts in the 2-8keV band (1)ctphot.count;em.X-raydoublenullablee_HcNet? Error in HcNet (1)ctphot.count;em.X-rayfloatnullableHRl68The 68% lower limit of hardness ratiophot.flux;arith.ratiofloatHRHardness ratio (1)phot.flux;arith.ratiofloatHRu68The 68% upper limit of hardness ratiophot.flux;arith.ratiofloatC21l68The 68% lower limit of C21phot.count;arith.ratiofloatC21X-ray color C21 (2)phot.count;arith.ratiofloatC21u68The 68% upper limit of C21phot.count;arith.ratiofloatC32l68The 68% lower limit of C32phot.count;arith.ratiofloatC32X-ray color C32 (3)phot.count;arith.ratiofloatC32u68The 68% upper limit of C32phot.count;arith.ratiofloatJ/ApJS/169/401/table7The multiply-observed ChaMP X-ray source candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCXOMPChaMP X-ray source identification number (CXOMP JHHMMSS.s+DDMMSS in Simbad)meta.id;meta.maincharMultIdentification number for multiple observations (G1)meta.idintObsIDObservation identification numbermeta.idintCCDThe CCD identification numbermeta.idintSrcSource number assigned by wavdetect (G2)meta.idintObs.DateMonth of the observation datetime.epochnullableBNetNet counts in the broad 0.3-8keV bandctphot.count;em.X-raydoublee_BNetError in CNetctstat.errorfloatBRateCount rate in the broad 0.3-8keV bandct/sphot.count;em.X-rayfloate_BRateError in CRatect/sstat.errorfloatOAAOff axis angle (G4)arcmininstr.offsetfloatePosPositional uncertainty (G3)arcsecstat.errorfloatJ/ApJS/169/401/table1List of ChaMP fieldsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsIDObservation identification numbermeta.id;meta.mainintprimarySeqNumChandra sequence numbermeta.idintTargetTarget namemeta.idcharRAJ2000Hour of Right Ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000.0)pos.eq.dec;meta.mainNHColumn density (10^20^cm^-2^) (1)1e+20cm**-2phys.columnDensityfloatObs.DateDate of Observationtime.epochnullableTExpExposure time (2)kstime.duration;obs.exposurefloatInstrAim Point Detector typemeta.notecharChipsCCD Used (3)meta.id;instrintMult? Identification number for multiple observations (G1)meta.idintnullablePapI[YN] Paper I used (4)meta.codecharJ/ApJS/169/401/table3Energy conversion factor (ECF)Scg14ECF in 0.5-2keV band assuming {Gamma}_ph_=1.4 (1)mJ.m**-2.count**-1arith.factorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsIDObservation identification numbermeta.id;meta.mainintCCDThe CCD identification numbermeta.idintBg12ECF in 0.3-8keV band assuming {Gamma}_ph_=1.2 (1)mJ.m**-2.count**-1arith.factorfloatSg12ECF in 0.3-2.5keV band assuming {Gamma}_ph_=1.2 (1)mJ.m**-2.count**-1arith.factorfloatHg12ECF in 2.5-8keV band assuming {Gamma}_ph_=1.2 (1)mJ.m**-2.count**-1arith.factorfloatBcg12ECF in 0.5-8keV band assuming {Gamma}_ph_=1.2 (1)mJ.m**-2.count**-1arith.factorfloatScg12ECF in 0.5-2keV band assuming {Gamma}_ph_=1.2 (1)mJ.m**-2.count**-1arith.factorfloatHcg12ECF in 2-8keV band assuming {Gamma}_ph_=1.2 (1)mJ.m**-2.count**-1arith.factorfloatBg14ECF in 0.3-8keV band assuming {Gamma}_ph_=1.4 (1)mJ.m**-2.count**-1arith.factorfloatSg14ECF in 0.3-2.5keV band assuming {Gamma}_ph_=1.4 (1)mJ.m**-2.count**-1arith.factorfloatHg14ECF in 2.5-8keV band assuming {Gamma}_ph_=1.4 (1)mJ.m**-2.count**-1arith.factorfloatBcg14ECF in 0.5-8keV band assuming {Gamma}_ph_=1.4 (1)mJ.m**-2.count**-1arith.factorfloatHcg14ECF in 2-8keV band assuming {Gamma}_ph_=1.4 (1)mJ.m**-2.count**-1arith.factorfloatBg17ECF in 0.3-8keV band assuming {Gamma}_ph_=1.7 (1)mJ.m**-2.count**-1arith.factorfloatSg17ECF in 0.3-2.5keV band assuming {Gamma}_ph_=1.7 (1)mJ.m**-2.count**-1arith.factorfloatHg17ECF in 2.5-8keV band assuming {Gamma}_ph_=1.7 (1)mJ.m**-2.count**-1arith.factorfloatBcg17ECF in 0.5-8keV band assuming {Gamma}_ph_=1.7 (1)mJ.m**-2.count**-1arith.factorfloatScg17ECF in 0.5-2keV band assuming {Gamma}_ph_=1.7 (1)mJ.m**-2.count**-1arith.factorfloatHcg17ECF in 2-8keV band assuming {Gamma}_ph_=1.7 (1)mJ.m**-2.count**-1arith.factorfloatJ/ApJS/169/401/table4Source flagsType[12356n] Flag type (1)meta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFlagFlag numbermeta.code.errorintCommMeaning of the flagmeta.notechar