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nom.tam.fits is a full-featured, fast, 100% pure Java 8+ library for reading, writing, and modifying FITS files. FITS (Flexible Image Transport System) is a binary format of many astronomical datasets and images. The library owes its origins to Tom A. McGlynn (hence the nom.tam prefix) at NASA Goddard Space Flight Center. Currently it is maintained by Attila Kovacs at the Center for Astrophysics | Harvard & Smithsonian.

This is an open-source, community maintained, project hosted on github as nom-tam-fits.

The library requires a level of familiarity with FITS and its common standards and conventions for effective use. For example, while the library will automatically interpret and populate the mandatory minimum data description in FITS headers, it will not automatically process optional standard or conventional header entries. It is up to the users to extract or complete the description of data to its full extent, for example to include FITS world coordinate systems (WCS), physical units, etc. Users are encouraged to familiarize themselves with the FITS standard and conventions described therein to be effective users of this library.