Документ взят из кэша поисковой машины. Адрес оригинального документа : http://xmm.vilspa.esa.es/sas/7.0.0/doc/epevents/node8.html
Дата изменения: Thu Jun 29 00:29:36 2006
Дата индексирования: Sat Dec 22 09:35:37 2007
Кодировка:

Поисковые слова: comet tail
Analysis of very bright sources XMM-Newton SAS Home Page
XMM-Newton Science Analysis System


epevents (epevents-6.42) [xmmsas_20060628_1801-7.0.0]

Analysis of extended sources Out-of-time events Examples Home Index

Meta Index / Home Page / Description / Out-of-time events

Analysis of very bright sources

A different approach is done via the setting withctisrcpos=Y: all event energy corrections do not use the actual RAWY coordinate but the corresponding RAWY location of the source (SRCPOS) as determined by the task epframes (either automatically or via setting withsrccoords=Y). So all events are assumed to originate from the source position. Events that really occur at a RAWY different from SRCPOS get a wrong (usually too high) CTI correction instead. (Note, that this procedure is the correct handling for TIMING and BURST mode - where it is performed automatically). A spatial selection should be applied in the final event analysis to deal only with detector portions dominated by Out-of-Time events. The task epchain may be used with the setting ccds=4 withctisrcpos=Y to process only the CCD 4 where usually the bright source is located that causes the Out-of-Time events.


Analysis of extended sources Out-of-time events Examples Home Index

XMM-Newton SOC/SSC -- 2006-06-28