Definition of the Flexible Image Transport System (FITS) R. J. Hanisch, A. Farris, E. W. Greisen, W. D. Pence, B. M. Schlesinger, P. J. Teuben, R. W. Thompson and A. Warnock III A&A, 376 1 (2001) 359-380 Published online: 15 September 2001 DOI: 10.1051/0004-6361:20010923