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From: Duncan Galloway <D.Galloway@physics.unimelb.edu.au>
Subject: Re: Simulations using fakeit with canned .rmfs - what to use for .arf?
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Date: Fri, 14 Oct 2005 17:41:30 +1000
From: Duncan Galloway <D.Galloway@physics.unimelb.edu.au>
Subject: Re: Simulations using fakeit with canned .rmfs - what to use for .arf?
To: "Pedro M. Rodriguez Pascual" <xmmhelp@xmm.vilspa.esa.es>
Cc: Duncan Galloway <D.Galloway@physics.unimelb.edu.au>
Thanks Pedro,
   I actually just found some canned .arfs via the US help pages linked 
from http://heasarc.gsfc.nasa.gov/docs/xmm/xmmhp_prop_tools.html. 
However, these are for full frame observations and so not useful for 
me.
   It had occurred to me to use arfgen, but I thought you needed a 
spectrum as well as an rmf for that?
Cheers
Duncan

On 14/10/2005, at 5:32 PM, Pedro M. Rodriguez Pascual wrote:

> Dear Duncan,
>
> Canned response files only contain redistribution matrices, effective 
> area (arf)
> is not included. Unfortunately, canned arf's are no longer available. 
> This
> should be generated with SAS task arfgen, for which the redistribution 
> (rmf) is
> an input.
>
> Depending on the actual simulation (actually, on the number of 
> photons/rays to
> simulate) and on the computer performance, a SciSim realization may 
> take a
> really long time.
>
> Sorry,
>
> Pedro

----------------------------------------------------------------------
  Duncan Galloway                           Phone:  +61 (0)3 8344-5428
  Rm. 309, School of Physics                Fax:    +61 (0)3 9347-4783
  University of Melbourne                   Mobile: +61 (0)405 438-678
  VIC 3010, Australia        E-mail: D.Galloway@physics.unimelb.edu.au
            -+ WWW: http://www.ph.unimelb.edu.au/~duncang +-


Reply 1

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From: Pedro M. Rodriguez Pascual <xmmhelp@xmm.vilspa.esa.es>
To: D.Galloway@physics.unimelb.edu.au
Subject: Re: Simulations using fakeit with canned .rmfs - what to use for .arf? (PR#19950)
Date: Fri Oct 14 07:53:07 2005
Hello Duncan, 

arfgen is designed to deal with actual data, but not for simulations. Note that
proper effective area does depend on the extraction region of the source and
this information is naturally found in the spectrum file created with evselect.

Your problem will be very much simplified if you have some data obtained with
the same instrument setup as you are interested to simulate.

Sincerely, 

Pedro

> Thanks Pedro,
>    I actually just found some canned .arfs via the US help pages linked 
> from http://heasarc.gsfc.nasa.gov/docs/xmm/xmmhp_prop_tools.html. 
> However, these are for full frame observations and so not useful for 
> me.
>    It had occurred to me to use arfgen, but I thought you needed a 
> spectrum as well as an rmf for that?
> Cheers
> Duncan
> 
> On 14/10/2005, at 5:32 PM, Pedro M. Rodriguez Pascual wrote:
> 
>> Dear Duncan,
>>
>> Canned response files only contain redistribution matrices, effective 
>> area (arf)
>> is not included. Unfortunately, canned arf's are no longer available. 
>> This
>> should be generated with SAS task arfgen, for which the redistribution

>> (rmf) is
>> an input.
>>
>> Depending on the actual simulation (actually, on the number of 
>> photons/rays to
>> simulate) and on the computer performance, a SciSim realization may 
>> take a
>> really long time.
>>
>> Sorry,
>>
>> Pedro
> 
> ----------------------------------------------------------------------
>   Duncan Galloway                           Phone:  +61 (0)3 8344-5428
>   Rm. 309, School of Physics                Fax:    +61 (0)3 9347-4783
>   University of Melbourne                   Mobile: +61 (0)405 438-678
>   VIC 3010, Australia        E-mail: D.Galloway@physics.unimelb.edu.au
>             -+ WWW: http://www.ph.unimelb.edu.au/~duncang +-
> 
> 

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