I am trying to do a PSF fitting on a fits image using SNOOPY (a point spread function fitter) and IRAF. I can open this image fine using imexam but when I select a point (a star or whatever) I get an error:
Warning: Pixels out of bounds
It seems that what I am seeing and what IRAF is seeing (behind the scenes) are not the same. As if there is some kind of a co-ordinate off-shift or something.
How would one go about fixing this ?
[Scientific Linux 6, 16bit , IRAF v2.16]
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Answer
If you’re using DS9 v7.2 then the problem is a bug in the DS9 cursor read causing the offset. The only workaround is to use an earlier version of DS9 or a more recent beta.