Документ взят из кэша поисковой машины. Адрес оригинального документа : http://xmm.vilspa.esa.es/sas/5.4.1/doc/region/node10.html
Дата изменения: Fri Jan 10 22:46:38 2003
Дата индексирования: Sat Dec 22 08:21:32 2007
Кодировка:
Поисковые слова: rigel

XMM-Newton Science Analysis System


region (region-6.2.2) [xmmsas_20030110_1802-5.4.1]

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Future developments

• When calculating source extraction radii based on encircled energy fraction the task assumes that the behaviour of the PSF is symmetric about the optical axis. Furthermore the effect of boresight offsets of the X-ray telescopes are ignored.

• A extra feature which may be useful is the facility to dump the region descriptions of all sources to a FITS file where it could be picked up by the IAS.

• PSF characteristics depend on photon energy. Ideally the task would (maybe optionally) attempt to calculate a mean photon energy for each source from the information in the source list.