I need to make some complex-valued images. As there is no complex BITPIX, I guess I need a real/imaginary axis. Does anybody have established conventions for this? Thanks, -Mike Nolan -- Mike Nolan +1 787 878 2612x334 Fax: +1 787 878 1861 nolan@*naic.edu Arecibo Observatory/Cornell University, HC03 Box 53995, Arecibo, PR 00612 USA