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XMM­Newton CCF Release Note
XMM­CCF­REL­145
EPIC MOS Spectral Response Distribution
R. D. Saxton
24 Jan 2003
1 CCF components
Name of CCF VALDATE EVALDATE List of Blocks changed CAL VERSION XSCS flag
EMOS1 REDIST 0027.CCF 1999­12­10 2000­07­15 CCD REDISTRIBUTION­n 3.152 NO
EMOS1 REDIST 0028.CCF 2000­07­15 2000­11­09 CCD REDISTRIBUTION­n 3.152 NO
EMOS1 REDIST 0029.CCF 2000­11­09 2001­04­18 CCD REDISTRIBUTION­n 3.152 NO
EMOS1 REDIST 0030.CCF 2001­04­18 2001­08­18 CCD REDISTRIBUTION­n 3.152 NO
EMOS1 REDIST 0031.CCF 2001­08­18 2001­09­26 CCD REDISTRIBUTION­n 3.152 NO
EMOS1 REDIST 0032.CCF 2001­09­26 2001­11­25 CCD REDISTRIBUTION­n 3.152 NO
EMOS1 REDIST 0033.CCF 2001­11­25 2002­11­07 CCD REDISTRIBUTION­n 3.152 NO
EMOS1 REDIST 0034.CCF 2002­11­07 ­ CCD REDISTRIBUTION­n 3.152 NO
EMOS2 REDIST 0027.CCF 1999­12­10 2000­07­15 CCD REDISTRIBUTION­n 3.152 NO
EMOS2 REDIST 0028.CCF 2000­07­15 2000­11­09 CCD REDISTRIBUTION­n 3.152 NO
EMOS2 REDIST 0029.CCF 2000­11­09 2001­04­18 CCD REDISTRIBUTION­n 3.152 NO
EMOS2 REDIST 0030.CCF 2001­04­18 2001­08­18 CCD REDISTRIBUTION­n 3.152 NO
EMOS2 REDIST 0031.CCF 2001­08­18 2001­09­26 CCD REDISTRIBUTION­n 3.152 NO
EMOS2 REDIST 0032.CCF 2001­09­26 2001­11­25 CCD REDISTRIBUTION­n 3.152 NO
EMOS2 REDIST 0033.CCF 2001­11­25 2002­11­07 CCD REDISTRIBUTION­n 3.152 NO
EMOS2 REDIST 0034.CCF 2002­11­07 ­ CCD REDISTRIBUTION­n 3.152 NO
2 Changes
This release includes new redistribution parameters for the post­cooling, after 7th Novem­
ber 2002, observations. It also contains tweaks to the parameters for all epochs, based on
a remodelling of the time dependence of the MOS spectral line resolution.
3 Scientific Impact of this Update
The new modelling of the spectral resolution results in an increase in the line width
at Aluminium K ff (1.5 keV) of ¸ 4% at all epochs and an epoch­dependent change of
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between ­1% and +1% at Manganese K ff (5.9 keV), relative to the previous set of CCFs
(0020­0026).
In summary, it would be wise to refit any low­energy line spectra which have been pre­
viously modelled using earlier CCF elements. Fits to high­energy lines, such as Fe K ff ,
which have used the CCF elements 0020--0026 will be unaffected by this update.
4 Estimated Scientific Quality
The line centre energy is accurate to 3--4 eV at 1.5 keV and the line widths are estimated
to be correct to ¸ 3%.
5 Expected Updates
6 Test procedures
The changes introduced here are only used within rmfgen. They are designed to allow
the SAS to produce RMFs which are equivalent to the LUX canned matrices. Tests will
check that they are as similar as possible.
1. Mos­1, epoch 8, post­cooling, imaging mode response, all patterns.
2. Mos­2, epoch 4 (01­May­2001) imaging mode response, all patterns.
7 Test results
The difference between the MOS standard RMF and the SAS responses generated using
these new CCF elements are shown in Figures 1 and 2. The MOS­1 and MOS­2 responses
are duplicated perfectly.
2

Figure 1: Comparison of MOS­1 canned response function, m11 im all 2002­11­07.rmf (not yet released)
v SAS equivalent for a 0.5 keV line from an imaging mode observation of revolution 540 (post­cooling),
using all patterns.
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Figure 2: Comparison of MOS­2 canned response function, m21 im all 2002­11­07.rmf (not yet released)
v SAS equivalent for a 3.0 keV line from an imaging mode observation of revolution 255 using all patterns.
4