---> The inputs are considered to be per square arcsecond.
---> When the solid angle is greater than one centroiding unit the flux per centroiding unit is reduced.
---> The Sersic profile for intensity of galaxies is used. ref: Graham A. W., Driver S. P., 2005, PASA, 22, 118
Counts per second are found using the energy flux for standard extra-galactic sources as given by NASA. Then using the Sersic profile, the ratio of Luminosity less than the radius of the centroiding area to total luminosity is found. This ratio is multiplied to the counts per second and divided by 29 to yield counts per frame.