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Can not create an empty FITS file #133

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jishnub opened this issue May 26, 2020 · 2 comments
Open

Can not create an empty FITS file #133

jishnub opened this issue May 26, 2020 · 2 comments

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@jishnub
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jishnub commented May 26, 2020

Currently it is not possible to create an empty fits file, one with minimal header information, something along the lines of what's presented here: esheldon/fitsio#164 (comment). This would be a nice feature to have.
@jbrinchmann
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I was looking at this because I need it too. Maybe I'm wrong about this but it seems to me that this is a limitation not of FITSIO (alone) but rather of CFITSIO because the fits_create_img function does not allow for Null data (which is how python's fitsio is dealing with this).

@jbrinchmann
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I left an issue at JuliaAstro/CFITSIO.jl#19 where I also include code to create an empty HDU using CFITSIO.

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@jbrinchmann @jishnub