Upper panel: light curve for a planet on an eccentric orbit with i = 90° calculated using batman. Upper-middle panel: difference between the light curves calculated using ellc for a spherical planet with the grid sizes indicated and with batman for the case i = 90°. Lower-middle panel: difference between the light curves calculated using ellc with the default grid size for planet described by either a Roche potential or a polytrope with index n = 1.5 and with batman for the case i = 90°. Lower panel: difference between the light curves calculated using ellc with the default grid size and a spherical planet and with batman for an eccentric orbit with i = 87°. The difference in flux of approximately 50 ppm during ingress and egress is the result of an inaccurate estimate for the time of periastron in the batman model.