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: http://xmm.vilspa.esa.es/calibration/documentation/CALHB/node197.html
Дата изменения: Tue Sep 20 19:45:18 2011 Дата индексирования: Mon Apr 11 02:47:54 2016 Кодировка: Поисковые слова: mdi |
The intensity distribution map will be stored in CCF CalSourceData (sections 4.3.7 and 4.3.8), in its first extension. A second extension will hold the energy spectrum.
The intensities of the calibration sources will be corrected for the
half life of the source, via. a function of the form
I=Iexp-(
t). Where,
(log
/T
) is an attribute in the CCF file,
and time t is the elased time between observationStartTime and
reference time which is also an attribute in the CCF file.
The function returns a energy spectrum in the range from E_LOW to E_HIGH for a given CCD, and 0-12 pattern selection, for a duration of exposure .