XMMSDSSGCE ivo://nasa.heasarc/xmmsdssgce NASA/GSFC HEASARC Takey et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Galaxy Cluster This table contains results from the analysis of a sample of 383 X-ray selected galaxy groups and clusters with spectroscopic redshift measurements (up to z ~ 0.79) from the 2XMMi/SDSS Galaxy Cluster Survey. The X-ray cluster candidates were selected as serendipitously detected sources from the 2XMMi-DR3 catalog that were located in the footprint of the Sloan Digital Sky Survey (SDSS-DR7). The cluster galaxies with available spectroscopic redshifts were selected from the SDSS-DR10. The authors developed an algorithm for identifying the cluster candidates that are associated with spectroscopically targeted luminous red galaxies and for constraining the cluster spectroscopic redshift. A cross-correlation of the constructed cluster sample with published optically selected cluster catalogs yielded 264 systems with available redshifts. The present redshift measurements (presented in reference paper III) are consistent with the published values. The current cluster sample extends the optically confirmed cluster sample from the authors' cluster survey by 67 objects. Moreover, it provides spectroscopic confirmation for 78 clusters among their published cluster sample, which previously had only photometric redshifts. Of the new cluster sample that comprises 67 systems, 55 objects are newly X-ray discovered clusters and 52 systems are sources newly discovered as galaxy clusters in optical and X-ray wavelengths. Based on the measured redshifts and the fluxes given in the 2XMMi-DR3 catalogue, the authors have estimated the X-ray luminosities and masses of the cluster sample. This table contains 145 entries, 67 of which are new (as of Paper III) optically confirmed clusters (marked by values of ref_source = 'Paper III') and 78 of which are clusters from Paper II which have now been spectroscopically confirmed (marked by values of ref_source = 'Paper II'). The tabular information on the 530 clusters that was presented in Paper II of this set of papers is available as the HEASARC <a href="/W3Browse/xmm-newton/xmmsdssgcs.html">XMMSDSSGCS table</a>). The following parameters were obtained from the current optical-band cluster detection algorithm: sdss_dr10_bcg_id, sdss_dr10_bcg_ra, sdss_dr10_bcg_dec, bcg_rmag, redshift, num_spect_members, phot_redshift, num_phot_members, and spatial_offset. This table was created by the HEASARC in July 2014 based on <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/A+A/564/A54">CDS catalog J/A+A/564/A54</a> file table1.dat. This is a service provided by NASA HEASARC . 2014A&A...564A..54T https://heasarc.gsfc.nasa.gov/W3Browse/all/xmmsdssgce.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=xmmsdssgce& GET text/xml 180 99999 true 10.76751 -9.46695 0.0333333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=xmmsdssgce GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_xmmsdssgce&Action=More+Options&Action=Parameter+Search&ConeAdd=1 XMM-NEWTON 0.0333333333333333 Optical X-ray public xmmsdssgce 2XMMi/SDSS Galaxy Cluster Survey Extension detid X-Ray Detection Number in the 2XMMi-DR3 meta.id int nullable name IAU Source Designation from 2XMMi-DR3 Catalog meta.id;meta.main char nullable alt_name Source Designation in Literature (NED) meta.id char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable redshift Cluster Redshift src.redshift double nullable radius_500 Estimated Radius R500 kpc phys.size.radius double nullable cat_flux X-Ray Flux in 0.5-2.0keV Band erg/s/cm^2 phot.flux;em.X-ray.soft double nullable cat_flux_error Error in X-Ray Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable cat_lx X-Ray Luminosity 0.5-2.0keV Band erg/s phys.luminosity;em.X-ray.soft double nullable cat_lx_error Error in X-Ray Luminosity erg/s stat.error;phys.luminosity;em.X-ray.soft double nullable lx_500 X-Ray Bolometric Luminosity within R500 erg/s phys.luminosity;em.X-ray.soft double nullable lx_500_error Error in X-Ray Bolometric Luminosity erg/s stat.error;phys.luminosity;em.X-ray.soft double nullable obsid XMM-Newton Observation Number meta.id;obs char nullable bii Galactic Latitude degree pos.galactic.lat double nullable spatial_offset Optical-X-Ray Offset kpc pos.distance;em.X-ray.soft;em.opt double nullable linear_scale_factor Scale at the Cluster Redshift kpc/arcsec arith.factor;pos.distance double nullable ref_source Note Concerning the Status of Each Cluster meta.ref char nullable phot_redshift Cluster Photometric Redshift src.redshift.phot double nullable mass_500 Mass within R500 Solar_Mass phys.mass double nullable num_spect_members Number of Cluster Galaxies with Spectra meta.number short nullable num_phot_members Number of Cluster Galaxies with the Photometric Redshift meta.number short nullable lii Galactic Longitude degree pos.galactic.lon double nullable sdss_dr10_bcg_id Identification in the SDSS-DR10 of the Likely BCG meta.id.assoc char nullable sdss_dr10_bcg_dec Likely BCG Declination degree pos.eq.dec double nullable bcg_rmag Likely BCG Apparent magnitude in r-Band mag phot.mag;em.opt.R double nullable mass_500_error Error in Mass within R500 Solar_Mass stat.error;phys.mass double nullable sdss_dr10_bcg_ra Likely BCG Right Ascension degree pos.eq.ra double nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable