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From: pae@astro.keele.ac.uk
Subject: High energy PN cut-off
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Date: Tue, 3 Feb 2004 17:24:54 GMT
From: pae@astro.keele.ac.uk
To: xmmhelp@xmm.vilspa.esa.es
CC: pae@astro.keele.ac.uk
Subject: High energy PN cut-off
Full_Name: Phil Evans
Submission from: (NULL) (160.5.87.25)


I'm analysing some XMM-EPIC data - in the PN camera the countrate above 15keV
drops slightly, but continues at good, usable levels throughout the extracted
energy range (specchannelmax=20479, as suggested in the SAS documentation), for
both source and background. However, when I apply a model to this in xspec, the
model plummets to zero above ~18.5 keV, where the data is still usable. The
response files I am using were created for this dataset using rmfgen and arfgen.
IS there any way I can make this hard data usable, or am I forced to ignore it?
I can send plots if required.


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From: Norbert Schartel <xmmhelp@xmm.vilspa.esa.es>
To: pae@astro.keele.ac.uk
Subject: Re: High energy PN cut-off (PR#10106)
Date: Wed Feb  4 08:35:09 2004
Dear Phil,

the calibration of pn considers an energy
range up to 15 keV. Please, see at:
http://xmm.vilspa.esa.es/external/xmm_sw_cal/calib/index.shtml
and then "EPIC Calibration Status (pdf)".
The calibration of event with a higher
energy is not supported and unfortunately
such a support is not expected for the 
foreseeable future. Therefore, we strongly 
recommend to restrict to the calibrated energy 
range for every scientific work.

With best regards
Norbert

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