The most commonly used file format in astronomical data analysis is the FITS format (see Fits for an introduction), therefore Gnuastro’s library provides a large and separate collection of functions to read/write data from/to them (see FITS files (fits.h)). However, FITS is not well recognized outside the astronomical community and cannot be imported into documents or slides. Therefore, in this section, we discuss the other different file formats that Gnuastro’s library recognizes.
GNU Astronomy Utilities 0.23 manual, July 2024.