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XMM-Newton Science Analysis System


embadpixfind (embadpixfind-2.6.1) [xmmsas_20211130_0941-20.0.0]

Preparatory work

Call emeventsproj with rejectbadevents=Y to project the events file to an image. An image built by evselect would be accepted as well, but would not include the secondary pixels of multiple events (this may miss weak bad pixels next to a strong one).
For optimal electronic noise rejection, the events file should be built by successive calls to emevents (analysepatterns=N flagbadpixels=N splitdiagonals=N randomizeposition=N allow it to run much faster) and emenergy (correctcti=N correctgain=N randomizeenergy=N allow it to run much faster).

For calibration purposes, it is possible to improve the statistics (and the sensitivity to weak bright pixels or dark pixels) by stacking many images output of emeventsproj on top of one another before calling embadpixfind.



XMM-Newton SOC -- 2021-11-30