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XMM-Newton Science Analysis System


eradial (especget-1.54) [xmmsas_20211130_0941-20.0.0]

Source regions

The source region is used to define the centre of the source. Optionally, the program can calculate the centre of the source for calculating the radial profile by setting the parameter centroid=yes

The source centre is also used to determine the off-axis angle for the PSF.

Spatial regions may be entered in detector (DETX, DETY), 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 slowly. An error will result if the spatial region is not within the image. Any shape conforming to the selectlib rules may be used.



XMM-Newton SOC -- 2021-11-30