fix on read #20

Job	Run time
Linux python 3.9 conda-build all-deps	9m 28s
Run pre-commit hooks	12s
ubuntu-latest, py311-test-alldeps_noray	1m 38s
Linux python 3.9 sphinx all-deps	13m 34s
ubuntu-latest, py310-test-alldeps-cov	1m 40s
macos-latest, py311-test	1m 40s
macos-14, py311-test	1m 24s
windows-latest, py311-test-alldeps_noray	1m 25s
ubuntu-latest, py312-test-alldeps_noray	1m 38s
ubuntu-latest, py310-test	1m 40s
ubuntu-latest, codestyle	21s
ubuntu-latest, py39-test-alldeps_noray-astropy50-numpy121	1m 38s
ubuntu-latest, oldestdeps	1m 39s
ubuntu-latest, devdeps	1m 39s
	39m 36s

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