lnI vs. r^1/4, as used in the measurement of the galaxies half-light radii. The radial coordinate r is in pixels. The error bars on lnI are the standard error on the mean within each isophote. The solid line shows the linear regression. The value of b_max is the semi-minor axis considered for the elliptical region in which the intensities are being measured. Those regions have the same average ellipticity as the convolved profiles (Table 3), and the same PA as the galaxy (Table 2). Only one data frame is shown for each system.