Документ взят из кэша поисковой машины. Адрес оригинального документа : http://xmm.vilspa.esa.es/sas/6.5.0/doc/eregionanalyse/node6.html
Дата изменения: Tue Aug 16 10:28:59 2005
Дата индексирования: Sat Dec 22 13:52:33 2007
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XMM-Newton Science Analysis System


eregionanalyse (especget-1.19) [xmmsas_20050815_1803-6.5.0]

Meta Index / Home Page / Description / Input

Background

There are three possible ways of entering the background.

1. From a background region within the source image via the backexp parameter. In this case the task normalises for the different source and background region areas. NB: This normalisation does not take account of bad pixels, bad columns or chip gaps.

2. From a background image in which case the background is taken from the source region within the image specified in the bkgimageset parameter.

3. As a single value entered in counts per second via the bckval parameter.