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ccube is a cube computer. It accepts arithmetic expressions mixing numbers and FITS files to perform basic arithmetic. Do not search any further if you are looking for a command-line way to divide an image by a constant (normalization), or divide all planes in a cube by an image (flatfielding), or subtract an image from all planes of a cube (sky-subtraction), or compute the average image from 3 planes, etc.

ccube man page

Nicolas Devillard 2002-04-01