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matching an image to a reference image
02-03-2015, 17:26
Post: #1
matching an image to a reference image

I want to match (i.e. rotate and resample) an image to a given reference image without any co-adding.
For this, I have extracted and saved the header from the reference image. But still, when I run swarp, the result is rotated with respect to the reference image; the image size and pixel scale seem to be correct.

Does swarp recognize CROTAx keywords?
Is it a problem, when the image axes (x,y) are not parallel to the coordinate axes (ra,dec)?

What else could be cause the problem?
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