The REFLEX galaxy cluster survey. VIII. Spectroscopic observations and optical atlas
L. Guzzo (1,2), P. Schuecker (2), H. Boehringer (2), C.A. Collins (3),, A.Ortiz-Gil (4,1), S.De Grandi (1), A.C. Edge (5), D.M. Neumann (6), S., Schindler (7), C.Altucci (1), P.A. Shaver (8) ((1) INAF - OA Brera; (2) MPE

TL;DR
This paper presents spectroscopic data and an optical atlas for the REFLEX galaxy cluster survey, providing redshifts for 1406 galaxies across 192 clusters, enhancing the understanding of cluster properties and distribution.
Contribution
It offers the final spectroscopic data set for the REFLEX survey, including new redshifts and detailed observational methods, improving the statistical completeness of galaxy cluster data.
Findings
1406 new galaxy redshifts measured
Most clusters previously lacked redshift data
Luminosity and redshift distributions analyzed
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 steradians (34% of the entire sky) below a declination of 2.5 deg and at high Galactic latitude (|b| > 20 deg). The REFLEX catalog includes 447 entries with a median redshift of 0.08 and is better than 90% complete to a limiting flux fx = 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 A at a FWHM resolution of ~14 A, and the measured redshifts have a total rms error…
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Taxonomy
TopicsAstronomy and Astrophysical Research · Galaxies: Formation, Evolution, Phenomena · Astrophysical Phenomena and Observations
