XMM-Newton Science Analysis System


evatt (saslib-1.88.1) [xmmsas_20230412_1735-21.0.0]

Informational attributes

• CLOSE_TO_CCD_BORDER This event was immediately next to a border of the CCD, so that part of its charge may have been lost.

• CLOSE_TO_CCD_WINDOW This event was immediately next to a border of the current CCD window (when not in full frame mode), so that part of its charge may have been lost. For EPIC/MOS only events next to the left and lower borders are affected and flagged.

• CLOSE_TO_ONBOARD_BADPIX This event was immediately next (to the left, right, above or below but not diagonally) to a bad pixel declared on board. Its energy will be imprecise, but since this may happen only when the bad pixel is inactive it should be a true X-ray.

• CLOSE_TO_BRIGHTPIX This event was immediately next (to the left, right, above or below but not diagonally) to a bright pixel not declared on board. Its energy will be imprecise, and it could be a false event if the bright pixel next to it was active.

• CLOSE_TO_DEADPIX This event was immediately next (to the left, right, above or below but not diagonally) to a dead pixel, so that part of its charge may have been lost.

• NEXT_TO_OFFSETCOL This event was immediately next to a column that has a higher lower threshold than the rest of the CCD. Part of its charge may have been lost.

• ON_OFFSETCOL This event was immediately on a column that has a higher lower threshold than the rest of the CCD. Part of its charge may have been lost.

• IN_SPOILED_FRAME This event was detected in a frame where other events were detected in wrong readout order or with illegal coordinates. The information related with this events is not reliable.

• INVALID_PATTERN This event is part of a pattern that cannot be produced by a single photon. It is either caused by pile-up or is a remnant of charged particle events (MIPs) that were rejected on-board (or in epframes if on-board rejection was switched off).

• OUT_OF_FOV This event was detected outside the nominal field of view of XMM. It was an out-of-time event recorded during CCD readout or due to internal noise.

• FLICKERING This event is due to a flickering pixel.