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: http://xmm.vilspa.esa.es/calibration/documentation/CALHB/node903.html
Дата изменения: Tue Sep 20 19:45:21 2011 Дата индексирования: Mon Apr 11 03:58:51 2016 Кодировка: Поисковые слова: m 8 |
Suitable observations should be longer than about 20 ksec, cover all the considered time period, and have different background levels, in particular the highest ones, so the sample should include observations taken at the beginning and end of the science window. It is helpful to consider objects for which no RGS spectrum is expected or to look at the RGS monitor pages.
Each observation must be examined to check that there is no significant RGS signal. This can be done by inspection of