ESO Imaging Survey II. Searching for Distant Clusters of Galaxies

Abstract

Preliminary results of a search for distant clusters of galaxies using the recently released I-band data obtained by the ESO Imaging Survey are presented. In this first installment of the survey, data covering about 3 square degrees in I-band are being used. The matched filter algorithm is applied to two sets of frames that cover the whole patch contiguously and these independent realizations are used to assess the performance of the algorithm and to establish, from the data itself, a robust detection threshold. A preliminary catalog of distant clusters is presented, containing 39 cluster candidates with estimated redshifts 0.3 < z < 1.3 over an area of 2.5 square degrees.