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XMM­Newton CCF Release Note
XMM­CCF­REL­21
OM GTI Selection
R. Much
October 3, 2000
1 CCF components
Name of CCF VALDATE List of Blocks
changed
CAL VERSION XSCS flag
OM HKPARMINT 0003 2000­01­01T00:00:00 HKPARMINT No
TRANSLATION No
2 Changes
First release
The CCF file om hkparmint provides the limits for the GTI check. Currently only dummy data
are included.
We expected the om hkparmint file to be updated, once a clear correlation between HKD and
instrument performance is found.
3 Scientific Impact of this Update
First release
1

XMM­Newton CCF Release XMM­CCF­REL­21 Page: 2
4 Estimated Scientific Quality
The instrument showed a stable performance sofar, and a HKD based GTI selection is not foreseen
at the moment. This approach for the GTI­selection is sufficiently good for commencing pipeline
processing of the data. Any corruption of OM data seen up to now was either associated with
onboard s/w alerts, wrong instrument settings or TM outages, rather than with a change in the
HKD.