Implement 2D sky subtraction using bivariate splines#193

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tepickering wants to merge 4 commits intoastropy:mainfrom tepickering:2d_skysub

+182

Commits on Nov 15, 2023

Commits on Nov 16, 2023

notebook updates
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Commits on Dec 15, 2023

Merge branch 'main' into 2d_skysub
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