copymask copies a mask from one aperture to another. i.e. if the same star affects more than one aperture, it should be masked identically from them all. This is possibly more common that one might imagine if one is forced to use dummy apertures to correct for scattered light from a nearby bright star.
NB copymask only handles the first mask of an aperture.
This command is a member of the class: .
Created: 28 Jan 2002