The EMSS catalog of X-ray-selected clusters of galaxies. I. An atlas of CCD images of 41 distant clusters

Details The EMSS catalog of X-ray-selected clusters of galaxies. I. An atlas of CCD images of 41 distant clusters The EMSS catalog of X-ray-selected clusters of galaxies. I. An atlas of CCD images of 41 distant clusters

1994-05-31

arxiv.org/abs/astro-ph/9405069v1

Astrophys.J.Suppl.94:583,1994

Astronomy and Astrophysics

Astrophysics

20 pages, LaTeX Version 2.09, IfA-94/6

Scientific paper

10.1086/192083

An atlas of deep, wide-field R-band CCD images of a complete sample of distant, X-ray-selected clusters of galaxies is presented. These clusters are the 41 most distant (z>= 0.15) and most X-ray luminous (Lx >= 2x10**44 erg\s-1) clusters in the Einstein Observatory Extended Medium Sensitivity Survey (EMSS) catalog that are observable from Mauna Kea (delta > -40 deg). The sample spans a redshift range of 0.15 <= z < 0.81 and includes at least 2 and possibly as many as 6 rich clusters with z>0.5. For the most part, the data are of superior quality, with a median seeing of 0''.8 FWHM and coverage of at least 1 Mpc X 1 Mpc in the cluster frame (Ho=50; q0=1/2). In addition, we update the available optical, X-ray and radio data on the entire EMSS sample of 104 clusters. We outline the cluster selection criteria in detail, and emphasize that X-ray-selected cluster samples may prove to be more useful for cosmological studies than optically selected samples. The EMSS cluster sample in particular can be exploited for diverse cosmological investigations, as demonstrated by the detection of evolution in the X-ray luminosity function previously reported, and more recently by the discovery of a large number of gravitationally lensed images in these clusters.

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