...
Gerrit Schellenberger is leading a project whereby the HIFLUGCS cluster sample (Reiprich & Böhringer, 2002, ApJ, 567, 716) is used to examine the effective area cross-calibration uncertainties between Chandra/ACIS and XMM-Newton/EPIC instruments. This extends the earlier IACHEC work due to the much larger number of objects and thus will yield more robust statistics and more detailed results.
- Gerrit's talk in IACHEC 2013 meeting
...