2003/05/13 by C. R. Mullis, B. R. McNamara, H. Quintana +6 · 2 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Cluster (spacecraft) #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy cluster #Galaxy groups and clusters #Luminosity #ROSAT #Redshift #Square (algebra) #astro-ph
paper · pdf · doi:10.1086/376866
published as Astrophys.J. 594 (2003) 154-171 · 17 pages, 7 figs, accepted for publication in ApJ, a version with full resolution images is available at http://www.eso.org/~cmullis/papers/160sd-catalog.ps.gz, machine-readable versions of the catalog are available at http://www.eso.org/~cmullis/research/160sd-catalog.html
arxiv created 2003/05/13 · openalex publication_date 2003/08/20 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present the revised catalog of galaxy clusters detected as extended X-ray sources in the 160 Square Degree ROSAT Survey, including spectroscopic redshifts and X-ray luminosities for 200 of the 201 members. The median redshift is z median = 0.25, and the median X-ray luminosity is L X,median = 4.2 × 10 43 h ergs s -1 (0.5-2.0 keV). This is the largest high-redshift sample of X-ray-selected clusters published to date. There are 73 objects at z > 0.3 and 22 objects at z > 0.5 drawn from a statistically complete flux-limited survey with a median object flux of 1.4 × 10 -13 ergs cm -2 s -1 . We describe the optical follow-up of these clusters with an emphasis on our spectroscopy, which has yielded 155 cluster redshifts, 110 of which are presented here for the first time. These measurements, combined with 45 from the literature and other sources, provide near-complete spectroscopic coverage for our survey. We discuss the final optical identifications for the extended X-ray sources in the survey region and compare our results to similar X-ray cluster searches.