lightcurves for low thermal inertia half-dark half-bright planet. Dashed lines show the lightcurves for a planet with the default parameters but a low thermal inertia (100 SI) and albedo values between 0.1 and 0.9. The solid curve is obtained if the surface of the planet is divided into two hemispheres (separated by two meridians) with highly different albedos: A = 0.1 and 0.9. On the top panel, the system is in a 2:1 spin-orbit resonance. The lightcurve is periodic but its shape depends on the arbitrary position of the hemispheres. On the bottom panel, the system is in pseudo-synchronization and the signal is no longer periodic.