A search for distant X-ray galaxy clusters
D. J. Burke, C. A. Collins, R. C. Nichol, A. K. Romer, B. Holden, R. M. Sharples, M. P. Ulmer
Abstract
We report on the progress of our search for serendipitous distant X-ray galaxy clusters in the ROSAT PSPC pointed observations archive. The initial aim of our work is to measure the X-ray luminosity function of clusters down to 4 x 10-14 erg cm-2 s-1 and so test the claims of cluster evolution at moderate redshifts. We have R band images and spectroscopy for 45 extended sources detected in 50 of the 100 deepest southern fields. A preliminary analysis suggests we cover a range of distances, from nearby clusters to possible distant clusters, z 1.0.
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