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embadpixfind (embadpixfind-2.6.1) [xmmsas_20230412_1735-21.0.0]

Columns and rows

If findbadsegments=Y embadpixfind looks for bright rows and columns too. This is done by projecting the image along rows and columns, and applying the same algorithm as above on the resulting 1-D vectors, except the width of the 1-D window (2 halfwidth1D + 1) is normally chosen larger than that of the 2-D window, to improve the background determination.
If a bright row or column is found, it is analysed to look for bright segments within. If it is found that the rest of the row/column is compatible (to 10% probability) with the neighbouring rows/columns, then only the bright segments are declared as bad. The minimum length of the bright segments is set such that one expects about 1 count in that length in the normal (not bright) parts.



XMM-Newton SOC -- 2023-04-16