Late g′r′i′z′ light curves of OT. For the g′ band, we also show its breakdown into afterglow, host-galaxy, and SN flux. Data are corrected for Galactic extinction, given in the AB magnitude system, and additionally offset by the values given in the legend, but they are not corrected for the extinction in the host, as in Fig. 1. For the SN component, we used the best-fit values provided in Table 1.