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From: nibeditaklt1@gmail.com
Subject: Time-resolved spectroscopy
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Date: Mon, 25 Jun 2018 07:54:43 GMT
From: nibeditaklt1@gmail.com
To: xmmhelp@sciops.esa.int
CC: nibeditaklt1@gmail.com
Subject: Time-resolved spectroscopy
Full_Name: Nibedita
Submission from: (NULL) (193.147.152.102)


Dear XMM Helpdesk,

I am trying to do time-resolved spectroscopy for a light curve which shows
different temporal patterns. But I could not find the method to construct
different spectral products for different time intervals of a light curve on the
website. 

Kindly help me.



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From: Jan-Uwe Ness <xmmhelp@sciops.esa.int>
To: nibeditaklt1@gmail.com
Subject: Re: Time-resolved spectroscopy (PR#83562)
Date: Mon Jun 25 08:21:52 2018
Dear Nibedita,

 we have written some threads of typical analysis processes:
 https://www.cosmos.esa.int/web/xmm-newton/sas-threads

For you particular case, assuming pn imaging mode data, you can start with the
thread
https://www.cosmos.esa.int/web/xmm-newton/sas-thread-pn-spectrum

and in step 9, you simply add a logical expression for the desired time interval
to the command under expression, thus:
    expression='(FLAG==0) && (PATTERN<=4) && ((X,Y) IN
circle(30360.5,28400.5,640)) && (TIME in [t1:t2])'

where t1 and t2 are start/end times in seconds of the internal XMM clock. These
are the same time units you find in your light curve.

 Best wishes,
Jan-Uwe Ness


> Dear XMM Helpdesk,
> 
> I am trying to do time-resolved spectroscopy for a light curve which shows
> different temporal patterns. But I could not find the method to construct
> different spectral products for different time intervals of a light curve
on
the
> website. 
> 
> Kindly help me.
> 
> 

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