Top: the phase curve of our simplistic model, showing a primary transit, an occultation, and a fix flux level F _oom in between. The model was generated with unrealistic planetary parameters to aid the visualization: R _p / R = 0.2 (large planet-to-star radius ratio), b ² = 0.25, ζ/ R = 10, E = 0, P = 3.0, k = 0.1, h = −0.2 (eccentric orbit), _pn = 0.01, _pd = 0.02, B = 0.2, F _oot = 1.2, F _oos = 1.3, F _oom = 1.25, and w = 2.0. See the text for the meaning of these parameters. Due to the eccentric orbit, the occultation is clearly offset from halfway between the primary transits, and due to the lack of limb darkening, the occultation exhibits a flat bottom.