astrosat-processing

Postprocessing steps.

1. Folder structure: zip files with the processed images should be placed in individual folders for each galaxy. For a few targets in the PHANGS Astrosat proposal, this required a by-hand copying for ~5 targets.
2. Set input and output directories in extract_convert_reproject_sample.py. These are hardcoded in the script but are easy to find (they're all pathlib.Path objects).
3. Run extract_convert_reproject_sample.py to unzip files, assign filter properties and convert to flux units, reproject to square pixels and swap E-W directions in the header, and export final products per filter for each galaxy.

Reprojection uses adaptive resampling from the reproject package by default.

extract_convert_reproject_sample.py will also produce the astrosat_filter_coverage.csv file with the filters available for each galaxy.

Final products are split into a Local Group, PHANGS, and "other" samples.