Äîêóìåíò âçÿò èç êýøà ïîèñêîâîé ìàøèíû. Àäðåñ îðèãèíàëüíîãî äîêóìåíòà : http://xmm.vilspa.esa.es/calibration/documentation/epic_cal_meetings/200006/P_Bennie.ps.gz Äàòà èçìåíåíèÿ: Wed May 14 13:36:00 2014 Äàòà èíäåêñèðîâàíèÿ: Wed Apr 13 13:21:12 2016 Êîäèðîâêà:

University of Leicester
X­rayAstronomy Group
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MOS Bad Pixels V.2
x Tables V.2 were uploaded on 25 May
x These were calculated from all cal. source data up to Orbit 49
x The cancellation is functioning correctly
For pixel tables V.3
x Eight defects were missed from the V.2 tables of MOS­2
x At least three new defects have occurred up to orbit 90
x I will include fewer of the lowest level recurring pixels in V.3, as requested
EPIC CDAT Meeting Paris, June 2000
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University of Leicester
X­rayAstronomy Group
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CCD Damage Status
EMCS­1, CCD­1
x Considering only changes in CTI parallel
, measured in the Mn­K line (5899­eV)
x The SAS should currently correct for a ``loss­at­launch'' of 0.0050­adc/transfer
x The trend above represents an additional 0.0008­adc/transfer loss per month
x Day 1, the loss on transfer from FOV centre should be (300 \Theta 0.0050) = 1.5­adc
x Day 200, the loss on transfer from FOV centre will be (300 \Theta 0.0102) = 3.1­adc
EPIC CDAT Meeting Paris, June 2000
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University of Leicester
X­rayAstronomy Group
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CCD Damage Status
EMCS­2, CCD­1
x Considering only changes in CTI parallel
, measured in the Mn­K line (5899­eV)
x The SAS should currently correct for a ``loss­at­launch'' of 0.0040­adc/transfer
x The trend above represents an additional 0.0006­adc/transfer loss per month
x Day 1, the loss on transfer from FOV centre should be (300 \Theta 0.0040) = 1.2­adc
x Day 200, the loss on transfer from FOV centre will be (300 \Theta 0.0079) = 2.4­adc
EPIC CDAT Meeting Paris, June 2000
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University of Leicester
X­rayAstronomy Group
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Conclusion
x We ought to be able to measure perceivable shifts in the Mn­line position.
x The rate of change of damage may be different between cameras.
x By the time of Day 200, EMCS­1 CCD­1 ought to be experiencing 2­adc shifts.
x This is almost twice the last prediction of 1­adc in 220 days (D.Lumb email)
x We need to follow this with updated predictions of the resolution degradation.
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