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Дата изменения: Fri Jan 10 22:33:06 2003
Дата индексирования: Sat Dec 22 09:04:58 2007
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XMM-Newton Science Analysis System


hkgtigen (hkgtigen-1.7.1) [xmmsas_20030110_1802-5.4.1]

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Please note:

• An invocation of hkgtigen for a particular instrument does generate a GTI which covers the duration of the entire observation. This does not exclude the possibility to apply this GTI data set to single-exposure event lists. GTIs outside the exposure will simply have no effect in the filtering process.
• The proposed scheme does not exclude the possibility to perform event list filtering with HK parameter GTIs from different instruments. For doing this, please construct the GTI sets for all desired instruments (e.g. gti_om.ds, gti_emos1.ds, gti_sc.ds) and combine them in the selection expression that drives the filtering process in task evselect:

      evselect table=ev.ds expression="TIME in gti(gti_emos1.ds) && \
             TIME in gti(gti_om.ds) && TIME in gti(gti_sc.ds)" ...
  

• Spacecraft HK GTIs can be constructed by invoking hkgtigen with instrument) set to xmm.