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Date and Time of the Query: 2019-04-24 T23:28:10 PDT
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For refcode 2009A&A...499..357G:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
2009A&A...499..357G The REFLEX galaxy cluster survey. VIII. Spectroscopic observations and optical atlas, Guzzo, L.; Schuecker, P.; Bohringer, H.; Collins, C. A.; Ortiz-Gil, A.; de Grandi, S.; Edge, A. C.; Neumann, D. M.; Schindler, S.; Altucci, C.; Shaver, P. A. Abstract. We present the final data from the spectroscopic survey of the ROSAT-ESO Flux-Limited X-ray (REFLEX) catalog of galaxy clusters. The REFLEX survey covers 4.24 ste radians (34% of the entire sky) below a declination of {delta} = +2.5^0^ and at high Galactic latitude (|b| > 20^degree^). The REFLEX catalog includes 447 entries with a median redshift of 0.08 and is better than 90% complete to a limiting flux f_X_ = 3x10^-12^ erg s^-1^ cm^-2^ (0.1 to 2.4 keV), representing the largest statistically homogeneous sample of clusters drawn from the ROSAT All-Sky Survey (RASS) to date. Here we describe the details of the spectroscopic observations carried out at the ESO 1.5 m, 2.2 m, and 3.6 m telescopes, as well as the data reduction and redshift measurement techniques. The spectra typically cover the wavelength range 3600-7500 Angstrom at a two-pixel resolution of ~14 Angstrom, and the measured redshifts have a total rms error of ~100 km s^-1^. In total we present 1406 new galaxy redshifts in 192 clusters, most of which previously did not have any redshift measured. Finally, the luminosity/redshift distributions of the cluster sample and a comparison to the no-evolution expectations from the cluster X-ray luminosity function are presented. Key words: surveys, galaxies: clusters: general, galaxies: distances and redshifts
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