Surface photometry of the stacked V image. The uncertainties are from a “jackknife” process described in the text. The green vertical lines mark the radii of the circles in units of the R_D of the image. The surface brightness for an annulus is the average over the entire area of the annulus and is plotted as a black filled circle at the midpoint of the annulus. The red line is a linear fit to the second through sixth points and shows an exponential dropoff.