Abstract:
We have used the 2.3-meter Vainu Bappu Telescope to perform CCD
imaging of X-ray-selected poor clusters of galaxies. Our sample consists of four
X-ray luminous clusters in the Einstein Observatory Extended Medium Sensitivity
Survey (EMSS) and noted by Gioia & Luppino (1994) to be optically less
rich than Abell clusters. The sample spans a redshift range of 0.08:,$ z :,$0.22.
We have assembled catalogs of galaxies detected in the cluster fields to a magnitude
limit mv ~ 22. This paper describes the data reduction performed on the
CCD images, the methods used to construct the extended object catalogs, the
photometric calibrations, and some understanding of their completeness and
contamination.
