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оригинального документа
: http://xmm.vilspa.esa.es/sas/7.1.0/doc/rgsbkgmodel/node8.html
Дата изменения: Mon Jul 9 04:21:08 2007 Дата индексирования: Sat Dec 22 12:57:39 2007 Кодировка: |
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.