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From: dr@star.sr.bham.ac.uk
Subject: PN Timing spectra
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Date: Thu, 15 Apr 2004 10:42:47 GMT
From: dr@star.sr.bham.ac.uk
To: xmmhelp@xmm.vilspa.esa.es
CC: dr@star.sr.bham.ac.uk
Subject: PN Timing spectra
Full_Name: Dan Reed
Submission from: (NULL) (147.188.32.208)


Hi

I have PN timing mode spectra and am currently rebinning it using grppha,
grouping channels so they have at least 20 counts to allow the use of the chi
squared statistic. I would like, additionally, to rebin the spectrum so that I
'oversample the FWHM of the energy resolution by a factor of three'. This a
standard remark in papers related to my area but Im not sure how they have done
it. Could you please advise me on this and on the energy resolution of PN timing
mode?

Thanks
Dan


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From: Matteo Guainazzi <xmmhelp@xmm.vilspa.esa.es>
To: dr@star.sr.bham.ac.uk
Subject: Re: PN Timing spectra (PR#10647)
Date: Thu Apr 15 14:21:15 2004
Dear Dan,

1. for the pn energy resolution in Timing Mode you can refer to Fig.26 in the
XMM-Newton User Handbook
(http://xmm.vilspa.esa.es/external/xmm_user_support/documentation/uhb/node30.html).
The difference between different instrumental modes is basically 0 at high
energy, and negligible at low energies.

2. there is no rebinning tool in the SAS. As far as I know, there is no spectral
rebinning tool in the LHEASOFT package either, which is able to make a rebinning
based on the instrumental energy resolution. The only way out I can see is
calculating off-line the rebinning with home-made software, and apply it via an
external file in "grppha".

 Regards,

 Matteo Guainazzi
 XMM-Newton Science Operations Center
 User Support Group

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