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XMM­Newton CCF Release Note
XMM­CCF­REL­289
Recent evolution of RGS gain and CTI
A.M.T. Pollock
September 18, 2012
1 CCF components
Name of CCF VALDATE List of Blocks changed XSCS flag
RGS1 ADUCONV 0022 2007­08­01T02:00:00 ADUCOEFF NO
RGS1 ADUCONV 0023 2010­01­01T00:00:00 ADUCOEFF NO
RGS1 ADUCONV 0024 2011­01­01T00:00:00 ADUCOEFF NO
RGS2 ADUCONV 0025 2007­08­01T02:00:00 ADUCOEFF NO
RGS2 ADUCONV 0026 2010­01­01T00:00:00 ADUCOEFF NO
RGS2 ADUCONV 0027 2011­01­01T00:00:00 ADUCOEFF NO
RGS1 CTI 0010 2007­08­01T06:00:00 CTI NO
CTI EXTENDED
XCTI
CTIY1­9
RGS1 CTI 0011 2010­01­01T00:00:00 CTI NO
CTI EXTENDED
XCTI
CTIY1­9
RGS1 CTI 0012 2011­01­01T00:00:00 CTI NO
CTI EXTENDED
XCTI
CTIY1­9
RGS2 CTI 0011 2007­08­17T02:00:00 CTI NO
CTI EXTENDED
XCTI
CTIY1­9
RGS2 CTI 0012 2010­01­01T00:00:00 CTI NO
CTI EXTENDED
XCTI
CTIY1­9
RGS2 CTI 0013 2011­01­01T00:00:00 CTI NO
CTI EXTENDED
XCTI
CTIY1­9
1

XMM­Newton CCF Release XMM­CCF­REL­289 Page: 2
2 Changes
Overlapping spectral orders in RGS are separated through the energies assigned to detected events
encoded in the PI values. As in all CCD detectors, PI values depend on the CCD gain and CTI which
are subject to change with time. It is therefore necessary periodically to recalibrate the gain and
CTI individually for each of the CCDs, although evolution is slow enough for this to be done about
every one or two years. The new values here supplied cover three epochs: consolidation following
the switch to RGS2 single­node operations in 2007; beyond 2010­01­01; and beyond 2011­01­01.
3 Test procedures & results
Two bright smooth continuum sources, the blazars Mkn421 and PKS2155­304, and two bright line­
rich coronal sources, Capella and AB Dor, have been processed with the current and new ADUCONV
and CTI CCFs and comparative statistics accumulated. Only event PI values are a#ected, causing
di#erent numbers of events to fall in the selection regions for the RGS spectral orders. Tables 1 and
3 compare the numbers of events selected in 1st and 2nd order spectra; and Tables 2 and 4 compare
the outcome of spectral analysis. The numbers of selected events changed by a fraction of a percent.
The changes in best­fit model parameters, while small, were sometimes larger than the statistical
error. The statistical quality of the models, as judged by the C­Statistic have usually improved,
although this is not always the case.
4 Estimated Scientific Quality
It is well known that the statistical errors calculated for model parameters are accompanied by
systematic errors that are hard to quantify. The analysis reported here suggests that systematic
errors due to imperfect calibration can be comparable to the statistical errors of bright sources.
5 Expected Updates
ADUCONV and CTI CCFs should be revised every one or two years.

XMM­Newton CCF Release XMM­CCF­REL­289 Page: 3
R1o1
R1o2
R2o1
R2o2
target
rev
ObsID
ADU
CTI
nT
nB
nT
nB
ADU
CTI
nT
nB
nT
nB
PKS2155­304
1543
0411780301
0021
0009
234478
9090
48046
2991
0024
0010
242547
8289
41591
2502
0022
0010
232217
9133
45119
2921
0025
0011
239168
8343
39316
2469
Mkn421
1640
0560980101
0021
0009
854199
28212
198595
10399
0024
0010
880754
28080
170938
8179
0022
0010
843585
28378
186560
9953
0025
0011
867473
27991
161688
8058
Mkn421
1732
0560983301
0021
0009
668344
20248
147804
6919
0024
0010
680295
21008
126844
5848
0022
0010
660749
20324
138261
6699
0025
0011
670185
20939
119424
5705
PKS2155­304
1734
0411780401
0021
0009
177472
9483
33692
3121
0024
0010
180463
8729
28888
2755
0022
0010
175673
9545
31717
3065
0025
0011
178033
8816
27435
2731
Mkn421
1820
0411083201
0021
0009
994072
28109
261923
11281
0024
0010
1034704
31214
224731
9243
0022
0010
978578
28128
244470
10885
0025
0011
1016980
30948
210891
9016
PKS2155­304
1902
0411780501
0021
0009
95446
8401
18583
2754
0024
0010
98896
6934
16322
2560
0022
0010
95522
8383
18639
2771
0025
0011
99038
6901
16415
2643
Mkn421
1904
0656380101
0021
0009
668057
21827
170990
8698
0024
0010
685587
23093
145523
7184
0023
0011
668510
21772
171772
8643
0026
0012
686066
23623
146418
7170
Mkn421
2001
0656380801
0021
0009
461022
14243
114672
5442
0024
0010
481104
15985
99150
4669
0023
0011
461579
14249
115304
5427
0026
0012
481371
15886
99966
4717
Mkn421
2002
0656381301
0021
0009
346494
12903
78996
4727
0024
0010
354253
13490
66837
3960
0023
0011
346989
12882
79414
4696
0026
0012
354814
13407
67377
3983
PKS2155­304
2084
0411780601
0021
0009
125739
6623
27107
2158
0024
0010
131884
5682
23559
1907
0022
0010
125896
6603
27257
2179
0025
0011
131975
5694
23704
1948
Mkn421
2094
0658800101
0021
0009
222528
13427
48912
4674
0024
0010
228652
13758
42491
4626
0023
0011
222714
13194
49152
4682
0026
0012
228880
13707
42481
4665
Mkn421
2192
0658800801
0021
0009
96664
6531
19723
2275
0024
0010
96999
6251
17231
2254
0024
0012
96862
6507
19907
2303
0027
0013
97159
6213
17492
2274
Table
1:
Number
of
events
selected
for
1st
and
2nd
order
RGS1
and
RGS2
spectra
of
bright
blazars
for
current
and
new
ADUCONV
and
CTI
CCFs.
The
table's
three
sections
correspond
to
the
three
most
recent
calibration
epochs.
The
ADU
and
CTI
columns
indicate
the
ADUCONV
and
CTI
CCF
version
numbers;
nT
and
nB
are
the
numbers
of
selected
events
in
the
total
and
background
spectra.

XMM­Newton CCF Release XMM­CCF­REL­289 Page: 4
target
rev
ObsID
ADU
CTI
rate
nH(10
20
cm
-2
)
#
norm
NPHA
NDOF
C­Statistic
PKS2155­304
1543
0411780301
0021
0009
9.016
0.802
±
0.067
2.589
±
0.007
4.374
±
0.011
9757
9754
12799.85
0022
0010
8.838
1.107
±
0.067
2.665
±
0.008
4.257
±
0.011
9757
9754
12368.71
Mkn421
1640
0560980101
0021
0009
28.824
1.653
±
0.036
2.432
±
0.004
16.114
±
0.022
9647
9644
15194.35
0022
0010
28.859
2.025
±
0.037
2.517
±
0.004
15.691
±
0.022
9647
9644
14090.78
Mkn421
1732
0560983301
0021
0009
28.693
1.508
±
0.040
2.524
±
0.004
15.506
±
0.024
9633
9630
13991.27
0022
0010
28.071
1.881
±
0.041
2.611
±
0.004
15.083
±
0.024
9633
9630
13266.80
PKS2155­304
1734
0411780401
0021
0009
6.246
0.809
±
0.076
2.785
±
0.009
2.852
±
0.008
9698
9695
12227.85
0022
0010
6.125
1.144
±
0.077
2.865
±
0.009
2.772
±
0.008
9698
9695
12130.89
Mkn421
1820
0411083201
0021
0009
46.543
0.955
±
0.034
2.110
±
0.003
27.716
±
0.036
9615
9612
17943.59
0022
0010
46.628
1.367
±
0.035
2.204
±
0.004
26.943
±
0.036
9615
9612
16369.73
PKS2155­304
1902
0411780501
0021
0009
3.038
1.050
±
0.109
2.778
±
0.013
1.432
±
0.006
9692
9689
11056.70
0023
0011
3.043
0.992
±
0.109
2.767
±
0.013
1.435
±
0.006
9692
9689
10909.27
Mkn421
1904
0656380101
0021
0009
39.465
1.233
±
0.042
2.206
±
0.004
22.954
±
0.037
9791
9788
16378.54
0023
0011
39.534
1.165
±
0.042
2.196
±
0.004
22.971
±
0.037
9791
9788
14372.38
Mkn421
2001
0656380801
0021
0009
27.990
1.333
±
0.050
2.266
±
0.005
16.282
±
0.031
9644
9641
11139.89
0023
0011
28.047
1.269
±
0.050
2.256
±
0.004
16.301
±
0.031
9644
9641
11399.73
Mkn421
2002
0656381301
0021
0009
23.019
1.651
±
0.057
2.516
±
0.006
12.627
±
0.027
9659
9656
10977.70
0023
0011
23.075
1.570
±
0.057
2.503
±
0.006
12.645
±
0.027
9659
9656
10884.57
PKS2155­304
2084
0411780601
0021
0009
4.664
0.834
±
0.094
2.519
±
0.010
2.374
±
0.009
9737
9734
11110.52
0023
0011
4.671
0.752
±
0.094
2.508
±
0.010
2.374
±
0.009
9737
9734
11070.47
Mkn421
2094
0658800101
0021
0009
17.455
1.670
±
0.073
2.593
±
0.008
9.151
±
0.025
9885
9882
11121.68
0023
0011
17.490
1.635
±
0.073
2.586
±
0.008
9.172
±
0.025
9885
9882
11250.41
Mkn421
2192
0658800801
0021
0009
8.229
1.776
±
0.109
2.758
±
0.012
4.138
±
0.017
9872
9869
10531.18
0024
0012
8.260
1.671
±
0.109
2.737
±
0.012
4.155
±
0.017
9872
9869
10703.26
Table
2:
Results
of
absorbed
power­law
models
fit
simultaneouly
with
XSPEC
to
1st
and
2nd
order
RGS1
and
RGS2
spectra
for
current
and
new
ADUCONV
and
CTI
CCFs.
The
table's
three
sections
correspond
to
the
three
calibration
epochs.
The
ADU
and
CTI
columns
indicate
the
ADUCONV
and
CTI
CCF
version
numbers.
The
rate
column
is
the
summed
rate
of
the
four
simultaneous
RGS
spectra.
The
best­fit
values
reported
are
the
full
set
of
free
parameters
for
these
simple
models.

XMM­Newton CCF Release XMM­CCF­REL­289 Page: 5
R1o1
R1o2
R2o1
R2o2
target
rev
ObsID
ADU
CTI
nT
nB
nT
nB
ADU
CTI
nT
nB
nT
nB
Capella
1413
0510780101
0021
0009
242794
13008
97540
6506
0024
0010
350716
15118
95941
5702
0022
0010
240903
13204
93366
6283
0025
0011
345993
15412
91294
5838
AB
Dor
1478
0412580301
0021
0009
63003
5095
20928
2033
0024
0010
80159
4722
18299
1823
0022
0010
62300
5120
19833
1927
0025
0011
78900
4769
17423
1773
Capella
1607
0510780201
0021
0009
182454
12504
71912
5528
0024
0010
250005
13608
68839
5238
0022
0010
180582
12600
68430
5398
0025
0011
247222
13250
65688
5090
AB
Dor
1662
0412580401
0021
0009
46129
5069
15271
2023
0024
0010
57025
4479
13129
1754
0022
0010
44681
5122
14497
2023
0025
0011
56197
4516
12517
1715
Capella
1796
0510780401
0021
0009
162979
7570
60585
3825
0024
0010
227258
8009
59543
3034
0022
0010
161045
7705
57661
3689
0025
0011
223596
8326
56113
3061
AB
Dor
1825
0602240201
0021
0009
53020
5219
17650
1989
0024
0010
68465
4282
15930
1849
0022
0010
52450
5257
16734
1971
0025
0011
67326
4353
15054
1802
AB
Dor
1848
0412580601
0021
0009
41313
4726
13672
2023
0024
0010
52811
3940
12170
1640
0022
0010
41333
4756
13694
1796
0025
0011
52883
3882
12226
1683
Capella
1961
0510780501
0021
0009
135715
6700
47929
3177
0024
0010
187331
7122
47738
2606
0022
0010
135586
6681
47815
3179
0025
0011
187941
6925
48242
2546
Capella
2163
0510780601
0021
0009
162879
7100
57894
3462
0024
0010
226613
7904
56777
2922
0022
0010
163289
7028
58051
3464
0025
0011
227479
7840
57473
2944
Table
3:
Number
of
events
selected
for
1st
and
2nd
order
spectra
of
bright
coronal
sources
for
current
and
new
ADUCONV
and
CTI
CCFs.
The
table's
three
sections
correspond
to
the
three
most
recent
calibration
epochs.
The
ADU
and
CTI
columns
indicate
the
ADUCONV
and
CTI
CCF
version
numbers.
nT
and
nB
are
the
numbers
of
selected
events
in
the
total
and
background
spectra.

XMM­Newton CCF Release XMM­CCF­REL­289 Page: 6
target
rev
ObsID
ADU
CTI
rate
OVIII
FeXVII
NeX
NPHA
NDOF
C­Statistic
flux(10
-5
cm
-2
s
-1
)
Capella
1413
0510780101
0021
0009
12.638
282.93
±
2.33
561.89
±
4.02
182.82
±
3.12
9675
9521
29350.91
0022
0010
12.378
279.98
±
2.32
545.77
±
3.96
182.24
±
3.00
9671
9517
29043.64
AB
Dor
1478
0412580301
0021
0009
3.549
131.17
±
1.58
51.09
±
1.36
80.69
±
2.14
9707
9562
12247.54
0022
0010
3.469
130.62
±
1.58
49.88
±
1.35
77.46
±
2.09
9707
9562
12011.50
Capella
1607
0510780201
0021
0009
10.116
257.73
±
2.09
536.07
±
4.40
150.89
±
2.67
9720
9566
23606.28
0022
0010
9.914
258.26
±
2.10
521.05
±
4.35
146.49
±
2.63
9722
9568
22941.76
AB
Dor
1662
0412580401
0021
0009
2.591
115.05
±
1.48
45.61
±
1.25
66.74
±
1.96
9716
9571
11570.45
0022
0010
2.534
115.08
±
1.48
43.90
±
1.23
63.42
±
1.77
9718
9573
11453.81
Capella
1796
0510780401
0021
0009
8.031
227.27
±
2.03
480.59
±
3.44
112.56
±
2.02
9667
9513
22560.26
0022
0010
7.835
226.75
±
2.03
458.39
±
3.37
107.54
±
1.98
9668
9514
22134.69
AB
Dor
1825
0602240201
0021
0009
2.499
106.95
±
1.38
44.94
±
1.13
58.29
±
1.66
9672
9527
11727.68
0022
0010
2.439
106.23
±
1.37
43.74
±
1.11
55.31
±
1.62
9672
9527
11668.56
AB
Dor
1848
0412580601
0021
0009
2.239
101.56
±
1.35
40.66
±
1.17
56.46
±
1.69
9693
9548
11478.25
0023
0011
2.243
101.83
±
1.36
40.81
±
1.17
56.80
±
1.69
9693
9548
11463.44
Capella
1961
0510780501
0021
0009
6.793
191.19
±
1.70
404.38
±
3.00
92.82
±
1.95
9699
9545
20059.58
0023
0011
6.810
191.19
±
1.69
404.38
±
2.99
92.82
±
1.94
9700
9546
20305.29
Capella
2163
0510780601
0021
0009
7.205
203.48
±
2.01
419.15
±
2.85
108.26
±
1.92
9656
9502
18690.84
0024
0012
7.240
203.48
±
2.00
419.15
±
2.84
108.26
±
1.91
9661
9507
19176.21
Table
4:
Results
of
multiple­line
and
single­continuum
models
fit
simultaneouly
with
XSPEC
to
1st
and
2nd
order
RGS1
and
RGS2
spectra
of
coronal
sources
for
current
and
new
ADUCONV
and
CTI
CCFs.
The
table's
three
sections
correspond
to
the
three
calibration
epochs.
The
ADU
and
CTI
columns
indicate
the
ADUCONV
and
CTI
CCF
version
numbers.
The
rate
column
is
the
summed
rate
of
the
four
simultaneous
RGS
spectra.
The
best­fit
values
reported
are
the
fluxes
of
the
three
brightest
lines,
some
of
which
were
indeed
indentical
as
shown.