Generating exposure maps along eRASS DE:IKI boundaries

[DTurner]

Hi!

I wondered if there was any way to zero the non-DR1 parts of the exposure maps of skytiles along the DE-IKI divide when generating them?

XGA (https://github.com/DavidT3/XGA) uses exposure maps to judge how much of a user specified source region is covered by a particular telescope, and unfortunately with the eRASS exposure maps we generate at the moment that can lead to some false positives - is there any way to force the exposure map generation to zero out the part of the tile we don't have events for?

Cheers,
David

[MiriamRamos]

Hi David,

Unfortunately, there is no such option on the eSASS4DR1. You could use Python to cut the exposure maps using these boundaries:

sel_de = (g_l > 179.94423568) & (g_l <= 359.94423568)

This will be corrected in future eSASS releases.

Best wishes,

Miriam Ramos-Ceja

[DTurner]

Hi Miriam,

That is a very good point, thanks very for a good stop-gap solution!

Cheers,
David