We report the serendipitous discovery of a giant grvitational arc in the Abell Supplementary cluster S295 during optical follow-up observations of clusters detected in the ROSAT All-Sky Survey. The cluster has a redshift z=0.3007 and a velocity dispersion of about 900 km/sec. This is the first giant arc newly found in a ROSAT Survey cluster, indicating the potential advantage of searching for giant arcs in X-ray selected clusters.
A Giant Arc in a ROSAT Detected Cluster of Galaxies / A. Edge, H. Bohringer, L. Guzzo, C. Collins, D. Neumann, G. Chincarini, S. Degrandi, R. Dummler, H. Ebeling, S. Schindler, W. Seitter, P. Vettolani, U. Briel, R. Cruddace, R. Gruber, R. Grusky, H. Gursky, G. Hartner, H. Macgillivray, P. Schuecker, P. Shaver, W. Voges, J. Wallin, A. Wolter, G. Zamorani. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - 289:1(1994), pp. L34-L36.
A Giant Arc in a ROSAT Detected Cluster of Galaxies
L. Guzzo;
1994
Abstract
We report the serendipitous discovery of a giant grvitational arc in the Abell Supplementary cluster S295 during optical follow-up observations of clusters detected in the ROSAT All-Sky Survey. The cluster has a redshift z=0.3007 and a velocity dispersion of about 900 km/sec. This is the first giant arc newly found in a ROSAT Survey cluster, indicating the potential advantage of searching for giant arcs in X-ray selected clusters.
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