Date: Tue, 28 Jun 2016 15:13:11 +0200
From: "Junjie Mao" <J.Mao@sron.nl>
To: "Rosario Gonzalez Riestra" <email@example.com>
Subject: Re: RGS spectrum with multiple source regions defined by
Thanks for your quick respond and the step-by-step recipe! It solves my
>>> Rosario Gonzalez Riestra <firstname.lastname@example.org> 06/28/2016
Dear Junjie Mao
> I am working on the RGS data for extended source, groups/clusters of
> and I am
> trying to extract spectra from two rectangular source regions, say,
> xdspregions="-1.7 -0.3 0.3 1.7". The aim is to exclude the central
> region, which suffers from contamination of non thermal component
> However, I am encountering the following problem. It turns out the
> got was only counts from one source region (i.e. the first half
> the expression in xdspregions), the counts from the second source
If you define several rectangular regions, you will get several
extraction regions and, when you eventually extract the spectra,
separate spectra (in this case, two). There is no way to merge them:
be as many spectra as extraction regions defined.
> I looked into the source list file and found that there was an
> extension of RGS1_SRC3_SPATIAL (the first source region) and another
> RGS1_SRC4_SPATIAL (the second source region, verified by extracting
> via tool cxctods9 and plot it with ds9 in dispersion - cross
> Note that in the SRCLIST extension I had 3 rows (PROPOSAL, ONAXIS and
> 3rd is introduce by myself), as expected. This also prevents me to
> like procsrcsexpr=...INDEX==3 & INDEX==4... since the source with
index=4 is not
This is true. You need to add sources to the list in order to extract
> So what went wrong and how do I get the a spectrum with counts from
> regions I defined?
I am sending you in a separate message from my personal account the
instructions of how to use this option.
XMM-SOC User Support Group
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