Upper panel: light curve computed using the ellc light curve model with a limb darkening profile from the STAGGER-grid for T_eff = 6000 K, log g = 4.5, [Fe/H] = 0. The parameters for this light curve are r_⋆ = 0.05, p = 0.1 and b = 0. Lower panel: difference between light curves computed with the “sparse” numerical grid option in ellc and the power-2 limb darkening law (dashed green line) or with the qpower2 algorithm (dotted cyan line) and the light curve shown in the upper panel. The power-2 and qpower2 light curves were calculated using the same parameters as in the upper panel.