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From: dr@star.sr.bham.ac.uk
Subject: MOS1 Timing mode
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Date: Mon, 5 Jan 2004 11:46:10 GMT
From: dr@star.sr.bham.ac.uk
To: xmmhelp@xmm.vilspa.esa.es
CC: dr@star.sr.bham.ac.uk
Subject: MOS1 Timing mode
Full_Name: Dan Reed
Submission from: (NULL) (147.188.32.208)


Hello

I am working on XMMdata for which I have MOS2 prime full window imaging data and
MOS1 timing data. I initially used emchain to create filtered eventlists, and
this supplied me with the imaging and a timing event list. However, could you
tell me if this timing mode event list is fine to work with or is there a better
way to create a timing mode eventlist. (i have read somewhere about using
'epproc timing=yes' for timing analysis but am not sure, please clarify). Could
you please also confirm that in timing mode the area of ccd in use is 100 pixels
by 600 pixels?

Thank you

Dan Reed


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From: Matthias Ehle <xmmhelp@xmm.vilspa.esa.es>
To: dr@star.sr.bham.ac.uk
Subject: Re: MOS1 Timing mode (PR#9810)
Date: Mon Jan  5 14:54:37 2004
Dear Dan Reed

it should not make any difference if you use emchain or the SOC supported
emproc task to generate your MOS timing mode event list. Both 'metatasks'
call the same subroutines.

Please see the SAS Users' Guide, available at
http://xmm.vilspa.esa.es/external/xmm_user_support/documentation/sas_usg/USG/index.html
esp. Section 4.3 for further details.

In timing mode, the X-axis (RAWX) of the central MOS CCD is the 1-D projected
image
of the source and has thus true spatial information; the Y-axis (RAWY) does not
carry any spatial information but is a measure of time, with a roll-over of 1024
time-units. During the generation of the calibrated timing mode event list, the

RAWY values are transformed into time info (and in the emproc processed event 
list the RAWY column is removed).

Cheers,
  Matthias

Matthias Ehle 
XMM-Newton SOC 
User Support Group

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