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XMM-Newton Science Analysis System

backscale (backscale-1.6) [xmmsas_20211130_0941-20.0.0]


To improve the execution time of the task the source region is divided into a grid which is used to check whether pixels lie on a CCD. The width of each grid element is set by default to be 40 detector pixels ($\sim2.0$ arcseconds). It has been chosen like this to give reasonable coverage of CCD gaps where they make a significant contribution to the total area while keeping reasonable execution times for larger areas. To improve the accuracy the resolution should be increased to e.g. 0.5 arcseconds.

XMM-Newton SOC -- 2021-11-30