FIBSEP--Extract Data from Individual Fibres

This separates out the individual fibres from a 2-d spectrum. It is assumed that the data had previously been corrected for S-distortion. This first produces a greyscale plot of the data (in a GWM window for example), and then the user is asked to mark two fibres and the limits (in X) that the program is to consider. If there is more than one ``slit'', then each must be dealt with by separate runs of the program. The method is to find the centres of the fibres by fitting Gaussians, and to divide the data half-way between these points. Since the separation of the fibres may vary slightly, the user is recommended to use CSUB on the data first. This method is fairly crude and the user may well wish to improve upon it, but if all that is required is radial velocities this should be adequate.