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Дата изменения: Mon Jul 9 10:18:11 2007
Дата индексирования: Sat Dec 22 14:01:49 2007
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XMM-Newton Science Analysis System


eregionanalyse (especget-1.26) [xmmsas_20070708_1801-7.1.0]

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.