J/A+A/420/61ivo://CDS.VizieR/J/A+A/420/61doi:10.26093/cds/vizier.34200061CDSSchuecker P.Boehringer H.Voges W.2017-06-22T14:28:17Z2007-11-06T10:38:17ZCDS support team

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

cds-question@unistra.frgalaxy-clustersx-ray-sourcesredshiftedA new method for a simultaneous search for clusters of galaxies in X-ray photon maps and optical galaxy maps is described. The method appears ideally suited for the analysis of the recently proposed wide-angle X-ray missions like DUO and ROSITA. As a first application, clusters are extracted from the 3rd version of the ROSAT All-Sky Survey (<IX/10>) and the Early Date Release of the Sloan Digital Sky Survey (SDSS, <J/AJ/123/567>). The time-consuming computations are performed within the German Astrophysical Virtual Observatory (GAVO). On a test area of 140 square degrees, 75 X-ray clusters are detected down to an X-ray flux limit of 3-5*10^-13^erg/s/cm^2^ in the ROSAT energy band 0.1-2.4keV. The clusters have redshifts z<0.5.2004A&A...420...61Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/420/61CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/123/567 : SDSS quasar catalog, I: Early Data Release (Schneider+, 2002)IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/420/61https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/420/61http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/420/61https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/420/61https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/420/61http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/420/61GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/420/61/clusters (Cluster parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/420/61/clusters?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/420/61/clusters?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/420/61/clusters?GETtext/xml+votable180.050000true0.3581-0.03120.0055555555555555566/1 17663 17726 17742 17746-17747 17756 17761 17770 17806-17807 17810 17813 17816 17818-17819 17828-17829 17832-17833 17840-17841 17981 17983 17998-17999 18005-18006 18009 18011 18019-18021 18026 18028 18032 18034 18062-18063 18067 18069-18070 18072-18073 18076 18084-18085 18090 18096 18176 23185 23187 23189 23192-23193 23195-23196 23208 23213 23216 23232https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/420/61?format=asciiX-rayOpticaldefaultJ/A+A/420/61/clustersCluster parametersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqCluster numbermeta.id;meta.maincharRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainNHNeutral galactic hydrogen column density1e+20cm**-2phys.columnDensity;pos.galacticfloatSUnabsorbed X-ray flux in the ROSAT energy band 0.1-2.4keV1e-16W.m**-2phot.flux;em.X-rayfloatln(L/L0)RDetection likelihoods on RASS-3 photon mapsstat.likelihoodfloatln(L/L0)SDetection likelihoods on SDSS galaxy mapsstat.likelihooddoublezestREstimated cluster redshift from RASS-3src.redshift;pos.heliocentricfloatzestSEstimated cluster redshift from SDSSsrc.redshift;pos.heliocentricfloatzspecSpectroscopic redshiftsrc.redshiftfloatNzNumber of cluster galaxies used for zspecmeta.numberintNoteNote whether the cluster in NOT found in a catalogue (1)meta.notecharNphNumber of X-ray photonsphot.count;em.X-rayfloatGammaMaximum likelihood X-ray countrates**-1phot.count;em.X-rayfloate_Gammarms uncertainty on Gammas**-1stat.errorfloatctr(GCA)Growth Curve Analysis (GCA) X-ray count rates**-1phot.count;em.X-rayfloate_ctr(GCA)rms uncertainty on ctr(GCA)s**-1stat.errorfloatHR(GCA)GCA hardness ratiophot.flux;arith.ratiofloatEXT(GCA)GCA negative logarithmic KS-probability for a point sourcemeta.notefloatRichOptical cluster richness from SDSSsrc.class.richnessfloatRemarksFurther remarks on the cluster (1)meta.notechar