Syntax: star2resp (Standard Star FITS input file) (Response function FITS output file) [Oke fluxed FITS spectrum] [-silent] [-E17] Converts star from DN/pixel to DN/sec/Angstrom and divides this INTO the Oke spectrum: resp = f(oke) / star . The star should have already been extinction corrected. Option: -E17 : Multiply response function by 1.e+17 . -silent : less verbose.