First column: RV versus time of a simulated equatorial spot covering 1.5% of the visible surface and a temperature contrast of 1200 K, for a seen edge-on sun-like star and for five different values of vsini from the upper panels to the lower panels: 3 km s^-1, 10 km s^-1, 30 km s^-1, 50 km s^-1, 80 km s^-1. Second column: same for the bissectors. Third column: BVS versus RV. Fourth column: BVS versus time.