A search for distant X-ray galaxy clusters
Burke, D. J. · Collins, C. A. · Nichol, R. C. · Romer, A. K. · Holden, B. · Sharples, R. M. · Ulmer, M. P.
Original · EN
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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