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XMM-Newton Science Analysis System

rgsfilter (rgsfilter-1.19) [xmmsas_20211130_0941-20.0.0]


The exposure maps suffer from a minor potential double-counting error. If a bad pixel is not known to the DPP, and is not present in the telemetry, and is of the variety that tends to be hot, then it is possible that it has been rejected on-board. Such bad pixels effectively subtract twice their active time from the map, once as an individual bad pixel, and again in the fractional exposure applied to the entire node.

XMM-Newton SOC -- 2021-11-30