Transit, eclipse and phase-curve models#
This section collects the light-curve models used for planetary transits, transit-time variations, secondary eclipses and orbital phase curves.
The basic distinction is whether a planet is described by one linear ephemeris, or whether each observed transit is assigned an independent mid-transit time. The secondary-eclipse and phase-curve model still uses the same orbital ephemeris as the primary transit, but adds the occultation depth and the brightness modulation over the orbit.