========================================================================== J/A+A/420/61 X-ray clusters of galaxies (Schuecker+, 2004) The following files can be converted to FITS (extension .fit .fgz or .fiZ) table2.dat table3.dat ========================================================================== Query from: http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=J/A+A/420/61 ==========================================================================
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Beginning of ReadMe : J/A+A/420/61 X-ray clusters of galaxies (Schuecker+, 2004) ================================================================================ Detection of X-ray clusters of galaxies by matching RASS photons and SDSS galaxies within GAVO. Schuecker P., Boehringer H., Voges W. <Astron. Astrophys., 420, 61-74 (2004)> =2004A&A...420...61S ================================================================================ ADC_Keywords: Clusters, galaxy ; X-ray sources ; Redshifts Keywords: galaxies: clusters - galaxies: general - methods: statistical - cosmology: large-scale structure of Universe Abstract: A 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. Description: Cluster parameters for 75 X-ray clusters of galaxies on a test area of 140 sq.deg. For each cluster the position, the galactic hydrogen column density, the detection likelihoods, estimated and spectroscopic redshifts, number of RASS3 photons, X-ray countrates, hardness ratios, extent likelihood and further parameters and remarks on the clusters are given.
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