bsub subtracts a bias frame from many others, overwriting the frames. bsub stores the exposure time of the bias frame used in the output file, as required for accurate dark subtraction with e.g. dsub or during operation of reduce.
bsub flist bias [coerce nccd nwin]
| flist | --- | Frame list |
| bias | --- | bias frame to subtract. The windows of this frame must at least match or enclose those of the frame list |
| coerce | --- | Coerce the frame to be subtracted the input file formats or not. Not always possible: needs binning factors to be correctly related and window start positions to match up correctly. |
| nccd | --- | CCD number if only one to be subtracted, except that 0 means all but then allows a particular window of each CCD to be handled. |
| nwin | --- | Window number if only one to be subtracted. |
See also add, mul, sub, div, uset, cadd, csub, cmul, cdiv, mdiv, dsub, msub
This command is a member of the classes: Arithematic, Programs.
Author: T.R. Marsh
Created: 13 Nov 2007