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I'm dealing with .fits (.fit) files with Mathematica, and these files are Fermi LAT GRBs data. We can import one of them by Import["https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/ 2017/bn170306588/current/glg_trigdat_all_bn170306588_v01.fit"] for example.

Every fit file has its header imformation, and we can read it via fv, and it looks just like that:

header of fits file

I cannot find any way to read the header of FITS file in Mathematica. So my question is this:

Is there any way to read FITS header information ?

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With

file = "https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170306588/current/glg_trigdat_all_bn170306588_v01.fit";

you can try

Import[file, "RawMetaInformation"]

You can find out about other accessible import elements with

Import[file, "Elements"]

{"Airmass", "Author", "BitDepth", "Channels", "ColorSpace", "Comments", "Data", "DataType", "Declination", "Device", "Dimensions", "Equinox", "ExposureTime", "Extensions", "Graphics", "HDUCount", "History", "HourAngle", "Image", "ImageSize", "IndexedAssociation", "MetaInformation", "Object", "ObservationDate", "Observer", "Organization", "Plaintext", "Range", "RawData", "RawMetaInformation", "Reference", "RightAscension", "SiderealTime", "Summary", "SummarySlideView", "TableData", "TableHeaders", "TableUnits", "Telescope"}

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Import["https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170306588/current/glg_trigdat_all_bn170306588_v01.fit", 
  "MetaInformation"]

yields a massive nested Association containing the headers for this rather complicated file.

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