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XMM­Newton CCF Release Note
XMM­CCF­REL­38
EPIC ASTROMETRY
D Lumb
November 7, 2000
1 CCF components
Name of CCF VALDATE List of Blocks
changed
CAL VERSION XSCS flag
EMOS1 LINCOORD 0013 2000­01­01T00:00:00 FOV NO
EMOS2 LINCOORD 0013 2000­01­01T00:00:00 FOV NO
EPN LINCOORD 0009 2000­01­01T00:00:00 FOV NO
2 Changes
The FOV extensions containing details of the field of view of the cameras has been modified.
Using data from observations like COMA, data were accumualted in detetcor co­ordinates, and
the shadow of the filter wheel rim determined.
3 Scientific Impact of this Update
Better definition of the portion of field of view which is inside the field of view (­used for exposure
map generation for example).
4 Estimated Scientific Quality
Due to the cone angle of in­coming rays from the telescope, the filterwheel rim is neither sharp nor
independent of energy. The wheel stands ё 100mm above the focal plane, so the outer boundary is
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XMM­Newton CCF Release XMM­CCF­REL­38 Page: 2
imprecise to the pixel level.
There may be slight differences from filter­to­filter or even observation to observation due to the
precise definition of stepper motor stops with respect to reference points.
5 Expected Updates
6 Acknowledgements