If set to 'all', all objects are dumped.
Considerable information is cached to speed execution on the same night of data.
The operation of the program is controlled by the contents of a file named reduc.inf that is in the current directory. If not found, this program will attempt to build a relevant file to get started. In normal use you will run this program many times on the way to getting your photometry reduced. What steps are done and how they are done are controlled by lines in the reduc.inf file. 39.4 Photometry extraction parameters, Object radius, inner sky, outer sky, gain.