Fitting the light curves at higher spectral resolution produces a more precise spectrum. Relative difference in percent between the errors on the transit depths measured at a resolution of R = 80 and those measured at the native resolution and then fitted afterward. A smoothed version of the difference transit depth precision (black line) is shown using a linear Savitszky–Golay filter with a window size of 31 points. The errors obtained from the lower resolution fit are systematically larger than those obtained at the native resolution, with the difference in precision ranging from 20% to 60% across the wavelength range.