XMM-Newton Science Analysis System
eregionanalyse (especget-1.19) [xmmsas_20050815_1803-6.5.0]
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Spatial regions may be entered in detector, sky (X/Y) or
celestial (RA, DEC, FK4 2000) coordinates.
If the coordinates of the region are not the same as those of
the image, e.g. a sky pixel region on a detector coordinate image,
then the task will still function but will run more quite slowly.
An error will result if the spatial region is not within the
image. Any shape conforming to the selectlib
rules may be
used but see section 3.2.7
XMM-Newton SOC/SSC -- 2005-08-16