[AstroPy] From pixels to RA DEC

Leonardo Parisi leonardo.parisi at gmail.com
Thu Aug 15 05:25:21 EDT 2019


Hi,

I'm looking to the formula used by Astropy to convert from pixels to ra/dec

After take care of distortions the formula used is this?

[image: Screenshot 2019-08-15 at 10.46.28.png]

where RA0 and DEC0 are the coordinates of the center of the image
gamma the pixel scale and alpha the rotational angle
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