...
Gerrit Schellenberger is leading a project whereby the HIFLUGCS cluster sample The Mass Function of an X-Ray Flux-limited Sample of Galaxy Clusters (Reiprich , T. H. & Böhringer, H. 2002, ApJ, 567, 716) is used to examine the effective area cross-calibration uncertainties between Chandra/ ACIS and XMM-Newton/EPIC instruments.
...