A simulated light curve for the following parameters: R_⋆/a = 0.2, k = 0.1, b = 0.4, q = 0.0008, h₁ = 0.75 ± 0.01, h₂ = 0.45 ± 0.05. The upper plot shows the light curve for the nominal values of h₁ and h₂ and (indistinguishable at this scale) the light curves for both h₁ and h₂ perturbed upwards by one standard deviation. The lower plot shows the change in flux due to a change by +1 standard deviation in h₁ (dashed line) and h₂ (dotted line). Also shown in the lower panel is the effect of using a sphere to model the shape of the transiting planet instead of a polytrope (dot-dashed line). Note that in the latter case the radius of the sphere has been reduced by 0.5% cf. the volume-average radius of the ellipsoid used to model the planet as a polytrope. This correction is required so that the eclipse depth for the spherical planet case matches the eclipse depth for the ellipsoidal planet model.