[gnuastro-devel] [bug #55844] WCS library (and thus all programs) can't deal with CROTAi values

[Mohammad Akhlaghi]

URL:
  <https://savannah.gnu.org/bugs/?55844>

                 Summary: WCS library (and thus all programs) can't deal with
CROTAi values
                 Project: GNU Astronomy Utilities
            Submitted by: makhlaghi
            Submitted on: Wed 06 Mar 2019 07:19:10 PM UTC
                Category: Libraries
                Severity: 3 - Normal
              Item Group: Crash
                  Status: In Progress
                 Privacy: Public
             Assigned to: makhlaghi
             Open/Closed: Open
         Discussion Lock: Any

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Details:

When the input's WCS uses the `CROTAi' keyword to specify rotation, all
Gnuastro's programs crash because the WCS library is not prepared to deal with
them. 

A description of this (depreciated) rotation in FITS, and its conversion to
the PC matrix is given here
<https://fits.gsfc.nasa.gov/users_guide/users_guide/node57.html>.




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