XMM-Newton Science Analysis System
omqualitymap (omqualitymap-1.6) [22.0.0-9173c7d25-20250127]
The algorithm works as follows
- Loop through each column of the image and for each column number i
- Loop through each row of the image and for each row number j
- Examine the 8 (less if near an edge) neighbouring image pixels around the pixel i, j
and count how many have a value at least 1/20th of the central pixel.
- If the number is less than 2 then assume the pixel i, j is abnormal- set bit 9 of the quality
pixels within a box of width and height 41 unbinned pixels.
XMM-Newton SOC -- 2025-01-27