Документ взят из кэша поисковой машины. Адрес оригинального документа : http://xmm.vilspa.esa.es/sas/7.1.0/doc/eregionanalyse/node16.html
Дата изменения: Mon Jul 9 10:18:11 2007
Дата индексирования: Sat Dec 22 14:10:46 2007
Кодировка:
Encircled energy factor XMM-Newton SAS Home Page
XMM-Newton Science Analysis System


eregionanalyse (especget-1.26) [xmmsas_20070708_1801-7.1.0]

Optimum radius 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 -- 2007-07-09