Effect of the particle size on the light curve (a more detailed look). Long-cadence observations (red) vs. calculations for 0.01- (green), 0.1- (blue), and 1-micron grains (purple) of pyroxene. Note the significant pre-transit brightening and less significant post-transit brightening, which are caused by the strong forward scattering. It is very sensitive to the particle size (see the text).