REFLEX星系团巡天。VIII。光谱观测和光学图谱
The REFLEX galaxy cluster survey. VIII. Spectroscopic observations and optical atlas
摘要：
本文给出了ROSAT-ESO通量限制X射线（REFLEX）星系团星系团的光谱测量结果。REFLEX巡天覆盖了2.5度赤纬以下和银河系高纬度（|b|> 20度）的4.24球面度（整个天空的34%）。REFLEX星表包括447个条目，平均红移为0.08，在极限通量fx = 3x10 ^{-12} erg s ^{-1} cm ^{-2}（0.1至2.4 keV）下完成了90%以上，代表了迄今为止从ROSAT全天巡天（RASS）中提取的最大统计均匀的星团样本。在这里，我们描述了在ESO 1.5米，2.2米和3.6米望远镜进行的光谱观测的细节，以及数据处理和红移测量技术。光谱通常覆盖3600 - 7500 A的波长范围，FWHM分辨率为~14 A，测量的红移总均方根误差为~100 km s ^{-1}。我们总共在192个星系团中提出了1406个新的星系红移，其中大部分以前没有测量过任何红移。最后，光度/红移分布的集群样本和比较从集群X射线光度函数的无演化的预期。
英文摘要：
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 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.
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