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…ed as the PrimaryHDU
PR Summary
The
combine_images
method of theFITSImageData
class allows one to combine multiple images into one, but a FITS file is only valid if the first image is aPrimaryHDU
. The previous implementation, when stitching multipleFITSImageData
instances together, was attempting to create multiplePrimaryHDU
instances (the first image from each instance). This PR fixes it and adds a single line to theFITSImageData
tests which ensure that this functionality works correctly.PR Checklist