J/ApJ/645/955ivo://CDS.VizieR/J/ApJ/645/955doi:10.26093/cds/vizier.16450955CDSBarkhouse W.A.Green P.J.Vikhlinin A.Kim D.-W.Perley D.Cameron R.,Silverman J.Mossman A.Burenin R.Jannuzi B.T.Kim M.Smith M.G.,Smith R.C.Tananbaum H.Wilkes B.J.2017-06-12T08:24:41Z2008-03-11T11:09:43ZCDS support team

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

cds-question@unistra.frsurveysx-ray-sourcesredshiftedWe present a survey of serendipitous extended X-ray sources and optical cluster candidates from the Chandra Multiwavelength Project (ChaMP). Our main goal is to make an unbiased comparison of X-ray and optical cluster detection methods. In 130 archival Chandra pointings covering 13deg^2^, we use a wavelet decomposition technique to detect 55 extended sources, of which 6 are nearby single galaxies. Our X-ray cluster catalog reaches a typical flux limit of about 10^-14^ergs/cm^2^/s, with a median cluster core radius of 21". For 56 of the 130 X-ray fields, we use the ChaMP's deep NOAO 4m MOSAIC g', r', and i' imaging to independently detect cluster candidates using a Voronoi tessellation and percolation (VTP) method. Red-sequence filtering decreases the galaxy fore- and background contamination and provides photometric redshifts to z~0.7. From the overlapping 6.1deg^2^ X-ray/optical imaging, we find 115 optical clusters (of which 11% are in the X-ray catalog) and 28 X-ray clusters (of which 46% are in the optical VTP catalog).2006ApJ...645..955Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/645/955CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/150/19 : ChaMP. I. First X-ray source catalog (Kim+, 2004)J/ApJ/618/123 : Hard X-ray-emitting AGNs (Silverman+, 2005)J/ApJ/644/829 : Chandra normal galaxies at intermediate redshift (Kim+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/645/955https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/645/955http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/645/955https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/645/955https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/645/955http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/645/955GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/645/955/BGV2006 (VTP clusters with X-ray upper limits)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/645/955/BGV2006?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/645/955/BGV2006?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/645/955/BGV2006?GETtext/xml+votable180.050000true5.99625-1.8380560.005555555555555556Cone search capability for table J/ApJ/645/955/ext_sources (X-ray extended sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/645/955/ext_sources?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/645/955/ext_sources?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/645/955/ext_sources?GETtext/xml+votable180.050000true6.70916717.3265830.0055555555555555566/686 2232 4124 4125 4378 5074 5439 7273 7281 7510 8043 8123 8126 8644 8673 8707 8908 8909 8912 8914 8920 8921 9181 9272 10051 10386 10387 10694 10743 10879 11667 11670 12025 13511 15036 17472 18032 18060 18780 18782 19036 19218 19282 19283 19847 23076 23078 24759 24764 24765 25100 25675 26022 26755 26756 27009 27126 27127 27132 27133 30833 31379 34139 35759 35769 36217 47386 48388 48423 48452 48453 48483 48498 49125https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/645/955?format=asciiX-rayOpticaldefaultJ/ApJ/645/955/BGV2006VTP clusters with X-ray upper limitsObsIDObservation IDmeta.id;obsintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[BGV2006]Sequential numbermeta.recordintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainzCorrected redshift (1)src.redshiftfloatn_z[de] Redshift origin (2)meta.notecharl_FX[<= ] Limit flag on FXmeta.code.errorcharFXX-ray flux (3)phot.flux;em.X-rayfloatl_LX[<= ] Limit flag on LXmeta.code.errorcharLXX-ray luminosity, in 10^+42^erg/s (3)1e+35Wphys.luminosity;em.X-rayfloatPSFChandra PSF size at the location of optically detected source (4)arcsecphys.angSize;srcfloatNamePublished ID (1)meta.idcharComCommentsmeta.notecharNEDSimbad column added by the CDScharJ/ApJ/645/955/ext_sourcesX-ray extended sourcesDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainExpTimeVignetting-corrected exposure timestime.duration;obs.exposureintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCXOMPSource Name, JHHMMSS.S+DDMMSSmeta.id;meta.maincharObsIDObservation IDmeta.id;obsintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainNHGalactic NH values (from Stark et al., 1992, See Cat. <VIII/28>)1e+20cm**-2phys.columnDensityfloatCountsCountsctphot.count;em.X-rayfloatFXX-ray flux1e-17W.m**-2phot.flux;em.X-rayfloate_FXrms uncertainty on FX1e-17W.m**-2stat.errorfloatLX? X-ray luminosity, in 10^+42^erg/s (1)1e+35Wphys.luminosity;em.X-rayfloatnullablee_LX? rms uncertainty on LX1e+35Wstat.errorfloatnullablercSource core radius (2)arcsecphys.angSize;srcfloatPSFChandra PSF size at the location of extended X-ray source (3)arcsecphys.angSize;srcfloatOAAOff-axis anglearcmininstr.offsetfloatzsp? Spectroscopic redshift (4)src.redshiftfloatnullablen_zsp[h] h: Redshift measured from our ChaMP spectroscopic programmeta.notecharz? Red-sequence filtered VTP corrected redshifts (5)src.redshift;pos.heliocentricfloatnullableNamePublished ID (1)meta.idcharComComments (2)meta.notecharDist? Distance from extended X-ray centroidarcsecpos.angDistanceintnullableNEDSimbad column added by the CDSchar