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From: mainpal@iucaa.ernet.in
Subject: average spectrum from respective om filters
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Date: Fri, 14 Nov 2014 04:12:31 GMT
From: mainpal@iucaa.ernet.in
To: xmmhelp@sciops.esa.int
CC: mainpal@iucaa.ernet.in
Subject: average spectrum from respective om filters
Full_Name: main pal
Submission from: (NULL) (202.52.53.226)


Hi, 
I am using XMM-Newton observation from OM instrument. My question is how to get
average spectrum from a multiple exposures of respective OM filters. Kindly give
some guideline or link for this task.
Thanking you in advance.
regards
mainpal


Reply 1

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From: Nora Loiseau <xmmhelp@sciops.esa.int>
To: mainpal@iucaa.ernet.in
Subject: Re: average spectrum from respective om filters (PR#75193)
Date: Fri Nov 14 14:15:39 2014
Dear Main Pal,

The OM filters are fully calibrated in magnitudes (instrumental & AB system)
and
absolute fluxes. If you have measurements with all filters then you can draw a
spectral energy distribution from about 200 nm to 600 nm.

If you have multiple exposures in a filter within the same observation, then you
can check for variability and if appropriate you can average all measurements.
The same applies if you have different observations.

The SAS software system (http://xmm.esac.esa.int/sas/current/howtousesas.shtml)
allows you to process the data and obtain fully corrected rates, fluxes and
magnitudes for the detected sources . These values are provided directly in the
XSA Archive (http://xmm.esac.esa.int/xsa/), There there are processed data so in
principle you don't need to run SAS.

Another way of accessing the data is by using the OM Catalogue, which contains
all detected sources in all observations till end 2012.

Best regards,

Nora
 

> Full_Name: main pal
> Submission from: (NULL) (202.52.53.226)
> 
> 
> Hi, 
> I am using XMM-Newton observation from OM instrument. My question is how to
get
> average spectrum from a multiple exposures of respective OM filters. Kindly
give
> some guideline or link for this task.
> Thanking you in advance.
> regards
> mainpal
> 
> ----
Dr. Nora Loiseau
XMM-Newton User Support Group


Followup 1

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Date: Fri, 14 Nov 2014 21:31:19 +0530 (IST)
From: Mainpal Rajan <mainpal@iucaa.ernet.in>
To: Nora Loiseau <xmmhelp@sciops.esa.int>
Subject: Re: average spectrum from respective om filters (PR#75193)
Thank you very much Nora for these important informations.
I have discussed some of the points with you when I was at ESAC during
July-August 2014 if you remember.
regards
Mainpal


----- Original Message -----
From: "Nora Loiseau" <xmmhelp@sciops.esa.int>
To: mainpal@iucaa.ernet.in
Sent: Friday, November 14, 2014 7:45:39 PM
Subject: Re: average spectrum from respective om filters (PR#75193)

Dear Main Pal,

The OM filters are fully calibrated in magnitudes (instrumental & AB system)
and
absolute fluxes. If you have measurements with all filters then you can draw a
spectral energy distribution from about 200 nm to 600 nm.

If you have multiple exposures in a filter within the same observation, then you
can check for variability and if appropriate you can average all measurements.
The same applies if you have different observations.

The SAS software system (http://xmm.esac.esa.int/sas/current/howtousesas.shtml)
allows you to process the data and obtain fully corrected rates, fluxes and
magnitudes for the detected sources . These values are provided directly in the
XSA Archive (http://xmm.esac.esa.int/xsa/), There there are processed data so in
principle you don't need to run SAS.

Another way of accessing the data is by using the OM Catalogue, which contains
all detected sources in all observations till end 2012.

Best regards,

Nora
 

> Full_Name: main pal
> Submission from: (NULL) (202.52.53.226)
> 
> 
> Hi, 
> I am using XMM-Newton observation from OM instrument. My question is how to
get
> average spectrum from a multiple exposures of respective OM filters. Kindly
give
> some guideline or link for this task.
> Thanking you in advance.
> regards
> mainpal
> 
> ----
Dr. Nora Loiseau
XMM-Newton User Support Group

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