Excess distribution (left) and distribution of uncertainties on the disk-to-star flux ratio (right). The Gaussian overplotted on the excess distribution has a width of σ = 1 and is used to guide the eye and illustrates that the data are consistent with this ideal behavior. Vertical dashed lines are plotted at f_CSE/σ_f = − 3 and f_CSE/σ_f = + 3 for the excess distribution and at the median uncertainty (2.5 × 10^-3) for the uncertainty distribution.