Institute, 2421 East 6th Street, Tucson, AZ 85719
Received: January 30,
This paper reviews in some
detail the ideas of differential photometry using a CCD detector.It discusses the basic ideas of
observational uses of a CCD for this kind of work and then gives details of the
quantitative aspects.Signal-to-noise calculations for a point source, optimum extraction of
the digital data via software, and correct statistical error assesment of the
data are some of the topics covered.An observational example is presented.