The Swift AGN and Cluster Survey. II. Cluster confirmation with SDSS data. (2016)
Keywords :
catalogs; galaxies clusters: general; galaxies: groups: general; large-scale structure of universe; surveys
Abstract:We study 203 (of 442) Swift AGN and Cluster Survey extended X-ray sources located in the SDSS DR8 footprint to search for galaxy over-densities in three-dimensional space using SDSS galaxy photometric redshifts and positions near the Swift cluster candidates. We find 104 Swift clusters with a >3{sigma} galaxy over-density. The remaining targets are potentially located at higher redshifts and require deeper optical follow-up observations for confirmation as galaxy clusters. We present a series of cluster properties including the redshift, brightest cluster galaxy (BCG) magnitude, BCG-to-X-ray center offset, optical richness, and X-ray luminosity. We also detect red sequences in ~85% of the 104 confirmed clusters. The X-ray
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We downloaded all swift/XRT "GRB" observations before 2013 Jul 27, and
reprocessed the data as described in Dai et al. (2015, Paper I,
J/ApJS/218/8). From this, we made images and corresponding exposure
maps in different energy ranges: total (0.2-10keV), soft (0.5-2keV),
and hard (2-10keV). SDSS DR8 provides the optical data for this study.
- IX/43 : 1SXPS Swift X-ray telescope point source catalogue (Evans+ 2014)
- VIII/91 : Planck Catalog of Compact Sources Release 1 (Planck, 2013)
- J/ApJS/218/8 : Swift AGN and Cluster Survey (SACS). I. (Dai+, 2015)
- J/A+A/576/A130 : Ultra-deep cat. of X-ray groups in ECDF-S (Finoguenov+, 2015)
- J/ApJS/216/28 : SWXCS III. Cluster cat. from 2005-2012 Swift data (Liu+, 2015)
- J/MNRAS/437/2607 : Low X-ray luminosity galaxy clusters (Nilo Castellon+, 2014)
- J/A+A/551/A142 : 7 year Swift-XRT point source catalog (1SWXRT) (D'Elia+, 2013)
- J/ApJ/763/127 : Galaxy clusters discovered in SPT survey (Reichardt+, 2013)
- J/A+A/547/A57 : Swift X-ray Telescope Cluster Survey (Tundo+, 2012)
- J/MNRAS/423/1024 : XCS-DR1 Cluster Catalogue (Mehrtens+, 2012)
- J/ApJS/199/34 : Clusters of galaxies in SDSS-III (Wen+, 2012)
- J/A+A/536/A8 : Planck early results. VIII. ESZ sample. (Planck+, 2011)
- J/A+A/534/A109 : MCXC Meta-Catalogue X-ray galaxy Clusters (Piffaretti+, 2011)
- J/A+A/528/A122 : SwiftFT catalog (Puccetti+, 2011)
- J/ApJS/191/254 : GMBCG galaxy cluster catalog from SDSS DR7 (Hao+, 2010)
- J/MNRAS/404/325 : Massive galaxy clusters lensing analyse (Richard+, 2010)
- J/ApJ/713/970 : Low-resolution SED templates of AGNs & galaxies (Assef+, 2010)
- J/ApJ/697/506 : Mid-infrared galaxy luminosity function from AGN (Dai+, 2009)
- J/A+A/499/357 : REFLEX galaxies redshifts (Guzzo+, 2009)
- J/ApJS/172/561 : The 400d cluster Survey (Burenin+, 2007)
- J/ApJS/172/182 : XMM Clusters of galaxies in COSMOS field (Finoguenov+ 2007)
- J/MNRAS/379/867 : BCG C4 cluster catalog (von der Linden+, 2007)
- J/ApJ/660/239 : MaxBCG cat. of galaxy clusters from SDSS (Koester+, 2007)
- J/ApJ/645/955 : ChaMP serendipitous galaxy cluster survey (Barkhouse+, 2006)
- J/ApJS/157/1 : Red-Sequence Cluster Survey (Gladders+, 2005)
- J/A+A/423/449 : RASS-SDSS Galaxy Clusters Survey. I. (Popesso+, 2004)
- J/AJ/125/2064 : Northern Optical Cluster Survey. II. (Gal+, 2003)
- J/ApJS/129/435 : NORAS galaxy cluster survey. I. (Bohringer+, 2000)
- http://swift.gsfc.nasa.gov/ : Swift GRB mission home page
- http://heasarc.gsfc.nasa.gov/W3Browse/all/mcxc.html : MCXC meta-catalog of
