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XMM­Newton CCF Release Note
XMM­CCF­REL­231
EPIC canned response matrices
M. Ehle
July 11, 2007
1 Purpose
The generated EPIC canned response matrix files (RMFs) are described and published on a ded­
icated web page at http://xmm.esac.esa.int/external/xmm sw cal/calib/epic files.shtml and allow
the user to load them (together with source and background spectra of EPIC observations and
related ancillary matrices) into spectral analysis packages like XSPEC for model fitting.
RMFs can also be created by the users with help of the XMM­Newton Science Analysis Software
(SAS). The method using SAS is described in the SAS User's Guide and Data analysis threads:
RMFs are automatically adjusted to the spectra under study with respect to energy and pattern
selection.
The canned RMFs are nevertheless published for the following reasons:
. Mainly in the early years of the XMM­Newton mission, computer resources at users' institutes
were frequently rather slow with respect to the generation of RMFs. This situation probably
has improved for many users over the years but might still be present for some of them.
. Canned RMFs are useful for users preparing XMM­Newton observing proposals, e.g. when
simulating expected source spectra, without having to fully process data with the SAS.
. The concept of providing standard canned matrices allows calibration developments to proceed
independently of SAS releases.
. The source spectra produced as part of the pipeline processing of the Survey Science Centre
are associated with a set of specific standard RMFs.
No ready­made MOS RMFs are provided as of SAS 6.5 for reasons explained in the web pages
'Update 2005­12­15' in http://xmm.esac.esa.int/external/xmm sw cal/calib/epic files updates.shtml.
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XMM­Newton CCF Release XMM­CCF­REL­231 Page: 2
However, to allow users access to MOS RMFs that can be used to prepare XMM­Newton ob­
serving proposals, since SAS 7.1.0, some RMFs have been provided again:
MOS1 and MOS2, pattern 0 and pattern 0­12 matrices for on­patch, wings of patch and o#­patch
positions, for the current epoch only.
More details on the generation of the canned response matrices can be found in:
. Generation of Canned pn Response Matrices, XMM­SOC­Procedure 03­01­0003­0001, 2007
http://xmm.esac.esa.int/CCB/SOPH/Procedures/03/Attachments/01­0003­0001.pdf
The matrices are provided at: http://xmm.esac.esa.int/external/xmm sw cal/calib/epic files.shtml
2 Changes
Response matrices have been generated for the latest SAS public release, i.e. version 7.1.0.
3 Scientific Impact of this Update
The matrices will allow the general user to spectrally analyze observations with corresponding
filter/mode/pattern/location and observing epoch settings. Further details are given on the web
page describing the canned matrices and in the SAS Manual and SAS threads.
4 Estimated Scientific Quality
In agreement with Scientific Quality reported for the corresponding public SAS release.
5 Test procedures & results
The matrices have been created with a validated SAS version.
6 Expected Updates
These matriced will be updated in the future after every public SAS release and/or after major
changes in the EPIC calibration.