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From: scott.engle@villanova.edu
Subject: Current Effective Areas
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Date: Mon, 17 Dec 2018 16:19:36 +0100
From: scott.engle@villanova.edu
To: xmmhelp@sciops.esa.int
Subject: Current Effective Areas
Full_Name: Scott G Engle
Submission from: (NULL) (193.147.152.102)


Hello,

I see that there are effective area plots published online in a number of
places, but there don't appear to be any recent updates to them. Are there plots
available that show how the effective area has behaved over time for the
different instruments (and the blocking filters)?

(Apologies if these are already available somewhere but I somehow missed them)

Best,
Scott


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From: Jacobo Ebrero <xmmhelp@sciops.esa.int>
To: scott.engle@villanova.edu
Subject: Re: Current Effective Areas (PR#84403)
Date: Tue Dec 18 13:07:26 2018
Dear Scott,

The most up-to-date plots regarding the effecting area of the different
XMM-Newton instruments can be found in the XMM-Newton Users Handbook, which are
regularly updated every year. In particular the effective area plots for the
EPIC cameras can be found here:

https://xmm-tools.cosmos.esa.int/external/xmm_user_support/documentation/uhb/epicfilters.html

and for the RGS here:

https://xmm-tools.cosmos.esa.int/external/xmm_user_support/documentation/uhb/rgsaeff.html

The plots have varied very little over time in the last ~15 years. The main
source of effective area losses is the increasing thickness of a contamination
layer which affects the MOS cameras and the RGS at very soft energies. Reports
on the evolution of the contamination can be found in the RGS Calibration Status
document, sect. 2.1.2:

http://xmm2.esac.esa.int/docs/documents/CAL-TN-0030.pdf

and for the MOS in the EPIC Calibration Status document, sect. 4.4:

http://xmm2.esac.esa.int/docs/documents/CAL-TN-0018.pdf

Best regards,
Jacobo
----------------------
Dr. Jacobo Ebrero
XMM-Newton SOC
User Support Group

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