Документ взят из кэша поисковой машины. Адрес оригинального документа : http://xmm.vilspa.esa.es/sas/8.0.0/doc/rgsbkgmodel/node8.html
Дата изменения: Wed Jul 2 04:09:38 2008
Дата индексирования: Fri Sep 5 22:20:08 2008
Кодировка:
Поисковые слова: вторая космическая скорость
Algorithm XMM-Newton SAS Home Page
XMM-Newton Science Analysis System


rgsbkgmodel (rgsbkgmodel-1.3.2) [xmmsas_20080701_1801-8.0.0]

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Algorithm 

 compute the background lightcurve of the problem event file applying
 the following selection expression

 CCDNR==9 AND (XDSP_CORR < -3.E-4 OR XDSP_CORR > 3.E-4)

 From the lightcurve, calculate the fraction of the total time for
 each of the pre-defined levels of background.

 Compute the background template spectra by weighting each of the
 template spectra by the corresponding factor calculated from the
 ligthcurve.


XMM-Newton SOC/SSC -- 2008-07-02