Документ взят из кэша поисковой машины. Адрес оригинального документа : http://xmm.vilspa.esa.es/sas/7.0.0/doc/lccorr/node11.html
Дата изменения: Thu Jun 29 01:34:48 2006
Дата индексирования: Sat Dec 22 08:33:41 2007
Кодировка:
Поисковые слова: comet tail

XMM-Newton Science Analysis System


lccorr (lccorr-2.27.1) [xmmsas_20060628_1801-7.0.0]

Meta Index / Home Page / Description / Exposure corrections in detail:

treatcosmicrays

A proportion of detected events are `minimum ionising particles' (MIPs). During each ccd frame, pixels occupied by a MIP are not free to detect an xray; hence MIPs lead to xray flux loss. The fraction of affected pixels is stored in the FRACEXP column of the EXPOSUnn extensions (the `nn' indicating the ccd/node) of the event list. Note that, although this column has the same name as that used to store the total exposure in the output TS, their values are not closely related.