Документ взят из кэша поисковой машины. Адрес оригинального документа : http://xmm.vilspa.esa.es/sas/8.0.0/doc/eregionanalyse/node19.html
Дата изменения: Fri Oct 24 21:40:49 2008
Дата индексирования: Sat Oct 17 00:21:36 2009
Кодировка:
Encircled energy factor XMM-Newton SAS Home Page
XMM-Newton Science Analysis System


eregionanalyse (especget-1.27.7) [???]

Optimum ellipse Output Background subtracted source counts Home Index

Meta Index / Home Page / Description / Output


Encircled energy factor

The fraction of counts contained within the source region assuming a point source located at the centre of the region. The EXTENDED mode (King profile) PSF is used to calculate the fraction assuming a fixed photon energy of 1.5 keV. This is currently only implemented for circular source regions, other shapes will give the wrong factor.


XMM-Newton SOC/SSC -- 2008-10-24