iraf binary package in Ubuntu Focal arm64

 IRAF is the "Image Reduction and Analysis Facility". The main
 IRAF distribution includes a good selection of programs for
 general image processing and graphics.
 .
 Other external or layered packages are available for
 applications such as data acquisition or handling data from other
 observatories and wavelength regimes such as the Hubble Space
 Telescope (optical), EUVE (extreme ultra-violet), or ROSAT and
 AXAF (X-ray). These external packages are distributed separately
 from the main IRAF distribution but can be easily installed.
 The IRAF system also the programmable Command Language scripting
 facility.

Source package