XMM-Newton Science Analysis System


evatt (saslib-1.88.1) [xmmsas_20230412_1735-21.0.0]

Rejection attributes

• OUT_OF_FOV This event was detected outside the nominal field of view of XMM. It was most likely a particle event.

• IN_BAD_FRAME This event was detected in a frame where something was incoherent, hinting at corrupted data.

• COSMIC_RAY This event was detected with one of the large patterns (30 or 31). It was most likely a particle event.

• ON_BADPIX This event was detected at the location of a registered bad pixel (not declared on board).

• REJECTED_BY_GATTI This event had E1 truncated at the maximum value. It was most likely a particle event.

• OUT_OF_CCD_WINDOW This event was detected outside the CCD or the current window. This is usually noise in the under/overscans.

• OUTSIDE_THRESHOLDS This event had total energy (E1+E2) lower than the EMDH lower threshold (noise fluctuation) or larger than the EMDH upper threshold (particle event).

• FLICKERING This event is due to a flickering pixel.

• UNDERSHOOT This event had very negative pixels next to it (electronic rebound).

• ON_BADROW This event was part of many events in one row in a single frame.

• BAD_E3E4 This event had an incoherent local background.

• ON_BADOFFSET This event is affected by a bit-flip in the onboard offset table, resulting in wrong energies (and other problems) on that row/column.

Note that OUTSIDE_THRESHOLDS could be split between BELOW_LOWER_THRESHOLD and ABOVE_UPPER_THRESHOLD, as those two cases reflect completely different situations.