Документ взят из кэша поисковой машины. Адрес оригинального документа : http://xmm.vilspa.esa.es/sas/8.0.0/doc/emask/node3.html
Дата изменения: Wed Jul 2 03:09:10 2008
Дата индексирования: Fri Sep 5 17:21:55 2008
Кодировка:
Поисковые слова: http astrokuban.info astrokuban

XMM-Newton Science Analysis System


emask (emask-2.12) [xmmsas_20080701_1801-8.0.0]

Meta Index / Home Page

Description

Using an exposure image from any of the EPIC instruments, a mask image representing the area on the sky which is searched by the source detection tasks is constructed. Optionally circular or (rotated) box regions read from a fits region file are excluded from the mask. The region file must contain columns SHAPE, X, Y, and R in the extension REGION. This format is provided by the SAS task ds9tocxc, the coordinates in X, Y must be image pixels. Up to 1000 regions from the region will be processed. The detection mask is a FITS image containing the integer values 0 and 1 where 1 marks the image area on which source searching will be performed.