GNU Astronomy Utilities manual

4.1.4 Common options

To facilitate the job of the users and developers, all the programs in Gnuastro share some basic command line options for the same operations where they are relevant. The list of options is provided below. It is noteworthy that these similar options are hard-wired into the programming of all of Gnuastro programs using GNU C Library’s argument parser merging ability.

For some programs, some of the options, might be irrelevant for example MakeProfiles creates FITS images based on a given catalog. Therefore no input images (and thus HDUs) are necessary for it. In such cases, the option is still listed and if a value is given for it, it is completely ignored.

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GNU Astronomy Utilities manual, November 2015.