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XMM­Newton CCF Release Note
XMM­CCF­REL­236
Truncated master o#set maps for epreject
M. Kirsch
August 16, 2007
1 CCF components
Name of CCF VALDATE List of Blocks changed
EPN REJECT 0005 2000­01­01T00:00:00 MASTER OFFSET MAP
2 Changes
A problem has turned up in the version v5.9 of epreject, related to the introduction of master o#set
maps: some pixels of the master o#set maps contain values which are so high that they may cause
the corrected PHA values to leave the allowed range.
A new version of epreject (v5.10) has been put into the development track, which avoids this
problem by restricting the maximum PHA correction. This version, however, will not be accessible
to the general guest observer before the next SAS release.
Fortunately, there is also a faster solution possible: by truncating the master o#set maps to
values between +/­ 7 adu, it can be ensured that the PHA values will stay within the allowed range,
also when the currently released version of epreject is used.
3 Scientific Impact of this Update
none
1

XMM­Newton CCF Release XMM­CCF­REL­236 Page: 2
4 Estimated Scientific Quality
No change.
5 Test procedures & results
epreject has been run on observation 0404840201 from revolution 1373. With the new CCF (EPN REJECT 0005)
epreject is not failing anymore.
6 Expected Updates
none