Light curves of HAT-P-36 b transits compared with the best prism+gemc fits. The dates, the telescopes, and the filters used for each transit event are indicated. Residuals from the fits are displayed in the right panel. Starting from the top, the first three light curves (this work) present anomalies that we interpret as occultations of starspot complexes by the planet. The third light curve is related to the transit event successive to that of the second one. The last light curve was extracted from Bakos et al. (2012) and reported here for comparison. Here Phase 0 corresponds to the mid-time of the transit.