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XMM­Newton CCF Release Note
XMM­CCF­REL­62
EPIC PN Energy Scale
D Lumb
February 9, 2001
1 Changes
The offset values for selected columns is uploaded to the PN instrument at the same time as bad
pixel locations. This offset corrects for low level noisy columns, by artificially suppressessing their
threshold values. However in the ground processing this value must be added back in to obtain the
correct energy scaling.
While previous submissions acounted for this, we noted that due to manual commanding, neces­
sary at various points, an old database set had to be used therefore the validity of these calibration
files has oscillated back and forth.
An added complication for this submission is that there were a number of very noisy pixels
appeared at Rev 156, and subsequently for several orbits the telemetry was only able to handle
these by manually adjusting the offset values in a number of columns. After Revolution 192 this
was fixed, except for occasional commanding errors (eg Rev 199)
2 Scientific Impact of this Update
For a limited set of columns ensures a correct energy conversion. However if the wrong file is used
it probably only affects a handful of columns at around a few eV level.
3 Estimated Scientific Quality
We expect that because the threshold of these columns was artificially raised, the actual detection
efficiencies will have been altered as well. Not yet accounted for.
1

XMM­Newton CCF Release XMM­CCF­REL­62 Page: 2
4 Expected Updates
With instrument database modifications, or due to future commanding errors.
5 CCF components
Name of CCF VALDATE List of Blocks
changed
CAL VERSION XSCS flag
EPN ADUCONV 0017 2000­06­11T03:00:00 OFFSET GAIN NO
EPN ADUCONV 0018 2000­06­29T02:49:00 OFFSET GAIN NO
EPN ADUCONV 0019 2000­07­01T08:07:00 OFFSET GAIN NO
EPN ADUCONV 0020 2000­07­03T12:00:00 OFFSET GAIN NO
EPN ADUCONV 0021 2000­07­03T22:16:00 OFFSET GAIN NO
EPN ADUCONV 0022 2000­07­05T15:00:00 OFFSET GAIN NO
EPN ADUCONV 0023 2000­07­05T22:30:00 OFFSET GAIN NO
EPN ADUCONV 0024 2000­07­07T15:54:00 OFFSET GAIN NO
EPN ADUCONV 0025 2000­07­08T11:50:00 OFFSET GAIN NO
EPN ADUCONV 0026 2000­07­10T03:16:00 OFFSET GAIN NO
EPN ADUCONV 0027 2000­07­10T17:00:00 OFFSET GAIN NO
EPN ADUCONV 0028 2000­07­13T12:16:00 OFFSET GAIN NO
EPN ADUCONV 0029 2000­07­26T04:48:00 OFFSET GAIN NO
EPN ADUCONV 0030 2000­07­28T04:32:46 OFFSET GAIN NO
EPN ADUCONV 0031 2000­07­29T00:59:00 OFFSET GAIN NO
EPN ADUCONV 0032 2000­08­02T00:22:00 OFFSET GAIN NO
EPN ADUCONV 0033 2000­08­02T20:19:00 OFFSET GAIN NO
EPN ADUCONV 0034 2000­08­04T11:42:00 OFFSET GAIN NO
EPN ADUCONV 0035 2000­08­04T20:11:00 OFFSET GAIN NO
EPN ADUCONV 0036 2000­08­07T00:58:00 OFFSET GAIN NO
EPN ADUCONV 0037 2000­08­10T10:00:00 OFFSET GAIN NO
EPN ADUCONV 0038 2000­10­31T23:00:00 OFFSET GAIN NO
EPN ADUCONV 0039 2000­11­03T21:38:00 OFFSET GAIN NO
EPN ADUCONV 0040 2000­11­05T16:00:00 OFFSET GAIN NO
EPN ADUCONV 0041 2000­11­05T21:31:00 OFFSET GAIN NO
EPN ADUCONV 0042 2000­11­07T16:00:00 OFFSET GAIN NO
EPN ADUCONV 0043 2000­11­07T21:22:00 OFFSET GAIN NO
EPN ADUCONV 0044 2000­12­13T20:48:00 OFFSET GAIN NO
EPN ADUCONV 0045 2000­12­14T11:07:00 OFFSET GAIN NO
EPN ADUCONV 0046 2000­12­15T14:02:00 OFFSET GAIN NO
EPN ADUCONV 0047 2000­12­15T16:56:00 OFFSET GAIN NO
EPN ADUCONV 0048 2000­12­19T14:05:00 OFFSET GAIN NO
EPN ADUCONV 0049 2000­12­19T16:41:00 OFFSET GAIN NO
EPN ADUCONV 0050 2000­12­21T14:19:00 OFFSET GAIN NO
EPN ADUCONV 0051 2000­12­21T16:39:00 OFFSET GAIN NO
EPN ADUCONV 0052 2000­12­25T13:18:00 OFFSET GAIN NO
EPN ADUCONV 0053 2001­01­08T12:47:00 OFFSET GAIN NO
EPN ADUCONV 0054 2001­01­08T52:53:00 OFFSET GAIN NO