a method to generate PNG cutouts of the host #334

Job	Run time
codestyle	7s
Python-3.9, deps=current	1m 25s
Python-3.9, deps=numpy122	1m 23s
Python-3.9, deps=astropydev	1m 35s
Python-3.9, deps=numpydev	1m 36s
Python-3.9, deps=astropydev-numpydev	1m 38s
Python-3.10, deps=current	1m 20s
Python-3.10, deps=numpy122	1m 30s
Python-3.10, deps=astropydev	1m 35s
Python-3.10, deps=numpydev	1m 35s
Python-3.10, deps=astropydev-numpydev	1m 36s
	15m 20s

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