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From: a.borghese@uva.nl
Subject: pile-up correceted rmf from a merged event file
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Date: Tue, 29 Nov 2016 09:35:22 GMT
From: a.borghese@uva.nl
To: xmmhelp@sciops.esa.int
CC: a.borghese@uva.nl
Subject: pile-up correceted rmf from a merged event file
Full_Name: Alice Borghese
Submission from: (NULL) (146.50.52.137)


Hello,
 
I am analyzing raw data with epproc and the option pileuptempfile=yes to get the
file for creating the pile-up corrected rmf. 
Now I would like to merge 3 observations with the tool merge, so I will have one
event file from which I will extract the corresponding spectrum. 
How can I create the pile-up corrected rmf in this case?

Thank you,
Alice



Reply 1

Resend
From: Jan-Uwe Ness <xmmhelp@sciops.esa.int>
To: a.borghese@uva.nl
Subject: Re: pile-up correceted rmf from a merged event file (PR#80486)
Date: Tue Nov 29 10:16:29 2016
Dear Alice Borghese,

 this is a tricky problem that is currently not possible. For the spectral
analysis you can perform a simultaneous fit to the three individual spectra
using the three individual pile-up corrected rmfs, I hope this workaround works
for you.

I have forwarded your question to the SAS team to evaluate whether the creation
of a pile-up corrected rmf for a merged events file will be possible in future
SAS releases.

Best regards,
Jan-Uwe


> 
> Hello,
>  
> I am analyzing raw data with epproc and the option pileuptempfile=yes to
get
the
> file for creating the pile-up corrected rmf. 
> Now I would like to merge 3 observations with the tool merge, so I will
have
one
> event file from which I will extract the corresponding spectrum. 
> How can I create the pile-up corrected rmf in this case?
> 
> Thank you,
> Alice
> 
> 
> 


Followup 1

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From: Alice Borghese <alice.borghese@gmail.com>
Date: Tue, 29 Nov 2016 12:16:11 +0100
Subject: Re: pile-up correceted rmf from a merged event file (PR#80486)
To: Jan-Uwe Ness <xmmhelp@sciops.esa.int>
--047d7bb044f247ab4805426eb71c
Content-Type: text/plain; charset=UTF-8
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Thanks for the information.

I was thinking to extract the spectra from the merged event file and
generate the rmf matrix trough the tool epicspeccombine (combining the
three pile-up corrected rmf matrices).
Do you think it is appropriate?

Thanks,
Alice

Ps. When I create a combined spectrum using epicspeccombine, the keyword
exposure is the averaged of the exposure time of the single obs. Therefore
I decided to use the merge tool.

2016-11-29 11:16 GMT+01:00 Jan-Uwe Ness <xmmhelp@sciops.esa.int>:

> Dear Alice Borghese,
>
>  this is a tricky problem that is currently not possible. For the spectral
> analysis you can perform a simultaneous fit to the three individual spectra
> using the three individual pile-up corrected rmfs, I hope this workaround
> works
> for you.
>
> I have forwarded your question to the SAS team to evaluate whether the
> creation
> of a pile-up corrected rmf for a merged events file will be possible in
> future
> SAS releases.
>
> Best regards,
> Jan-Uwe
>
>
> >
> > Hello,
> >
> > I am analyzing raw data with epproc and the option pileuptempfile=yes
to
> get
> the
> > file for creating the pile-up corrected rmf.
> > Now I would like to merge 3 observations with the tool merge, so I
will
> have
> one
> > event file from which I will extract the corresponding spectrum.
> > How can I create the pile-up corrected rmf in this case?
> >
> > Thank you,
> > Alice
> >
> >
> >
>
> this message and any attachments are intended for the use of the addressee
> or addressees only.
> The unauthorised disclosure, use, dissemination or copying (either in
> whole or in part) of its
> content is not permitted.
> If you received this message in error, please notify the sender and delete
> it from your system.
> Emails can be altered and their integrity cannot be guaranteed by the
> sender.
>
> Please consider the environment before printing this email.
>
>

--047d7bb044f247ab4805426eb71c
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<div dir=3D"ltr"><div>Thanks for the
information.<br><br></div><div>I was t=
hinking to extract the spectra from the merged event file and generate the =
rmf matrix trough the tool epicspeccombine (combining the three pile-up cor=
rected rmf matrices). <br></div><div>Do you think it is
appropriate?<br><br=
></div><div>Thanks,<br></div><div>Alice<br><br></div><div>Ps.
When I create=
 a combined spectrum using epicspeccombine, the keyword exposure is the ave=
raged of the exposure time of the single obs. Therefore I decided to use th=
e merge tool. </div></div><div
class=3D"gmail_extra"><br><div class=3D"gmai=
l_quote">2016-11-29 11:16 GMT+01:00 Jan-Uwe Ness <span
dir=3D"ltr">&lt;<a h=
ref=3D"mailto:xmmhelp@sciops.esa.int" target=3D"_blank">xmmhelp@sciops.esa.=
int</a>&gt;</span>:<br><blockquote
class=3D"gmail_quote" style=3D"margin:0 =
0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear Alice
Borghese,<=
br>
<br>
=C2=A0this is a tricky problem that is currently not possible. For the spec=
tral<br>
analysis you can perform a simultaneous fit to the three individual spectra=
<br>
using the three individual pile-up corrected rmfs, I hope this workaround w=
orks<br>
for you.<br>
<br>
I have forwarded your question to the SAS team to evaluate whether the crea=
tion<br>
of a pile-up corrected rmf for a merged events file will be possible in fut=
ure<br>
SAS releases.<br>
<br>
Best regards,<br>
Jan-Uwe<br>
<br>
<br>
&gt;<br>
&gt; Hello,<br>
&gt;<br>
&gt; I am analyzing raw data with epproc and the option pileuptempfile=3Dye=
s to get<br>
the<br>
&gt; file for creating the pile-up corrected rmf.<br>
&gt; Now I would like to merge 3 observations with the tool merge, so I wil=
l have<br>
one<br>
&gt; event file from which I will extract the corresponding
spectrum.<br>
&gt; How can I create the pile-up corrected rmf in this case?<br>
&gt;<br>
&gt; Thank you,<br>
&gt; Alice<br>
<div class=3D"HOEnZb"><div class=3D"h5">&gt;<br>
&gt;<br>
&gt;<br>
<br>
this message and any attachments are intended for the use of the addressee =
or addressees only.<br>
The unauthorised disclosure, use, dissemination or copying (either in whole=
 or in part) of its<br>
content is not permitted.<br>
If you re

Message of length 5394 truncated


Reply 2

Resend
From: Jan-Uwe Ness <xmmhelp@sciops.esa.int>
To: alice.borghese@gmail.com
Subject: Re: pile-up correceted rmf from a merged event file (PR#80486)
Date: Tue Nov 29 13:50:12 2016
Hi Alice,

interesting idea, it seems worth a try. If the extraction region is the same
size for each observation then the combining of the spectra and redistribution
files, which is done by weighting with exposure time, should work.

There may be some subtleties with how best to weigh piled-up data but to first
order it may work.

We would be interested to learn about the results and would appreciate if you
could keep is informed.

Thanks,
Jan-Uwe

> 
> Thanks for the information.
> 
> I was thinking to extract the spectra from the merged event file and
> generate the rmf matrix trough the tool epicspeccombine (combining the
> three pile-up corrected rmf matrices).
> Do you think it is appropriate?
> 
> Thanks,
> Alice
> 
> Ps. When I create a combined spectrum using epicspeccombine, the keyword
> exposure is the averaged of the exposure time of the single obs. Therefore
> I decided to use the merge tool.
> 
> 2016-11-29 11:16 GMT+01:00 Jan-Uwe Ness <xmmhelp@sciops.esa.int>:
> 
>> Dear Alice Borghese,
>>
>>  this is a tricky problem that is currently not possible. For the
spectral
>> analysis you can perform a simultaneous fit to the three individual
spectra
>> using the three individual pile-up corrected rmfs, I hope this
workaround
>> works
>> for you.
>>
>> I have forwarded your question to the SAS team to evaluate whether the
>> creation
>> of a pile-up corrected rmf for a merged events file will be possible
in
>> future
>> SAS releases.
>>
>> Best regards,
>> Jan-Uwe
>>
>>
>> >
>> > Hello,
>> >
>> > I am analyzing raw data with epproc and the option
pileuptempfile=yes to
>> get
>> the
>> > file for creating the pile-up corrected rmf.
>> > Now I would like to merge 3 observations with the tool merge, so I
will
>> have
>> one
>> > event file from which I will extract the corresponding spectrum.
>> > How can I create the pile-up corrected rmf in this case?
>> >
>> > Thank you,
>> > Alice
>> >

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