ROSAT-PSPC Observation of the Abell Cluster of Galaxies A2256 Briel, U. G. ; Ebeling, H. ; Edge, A. ; Hartner, G. ; Henry, J. P. ; Schwarz, R. ; Voges, W. Abstract Publication: Bulletin of the American Astronomical Society Pub Date: September 1990 Bibcode: 1990BAAS...22.1227B