Synthetic V- and I-band light curve and V − I colour index curves obtained by modelling, plotted with solid lines (green, red, and orange, respectively in the electronic version of this paper), in comparison with observational photometric data. Between the flux and colour curves, residuals are shown. The model assumes a temperature of the cool star T_cool = 2800 K. The expanded view of the out-of-eclipse V and I light curves (box with a dashed line) is shown in Fig. 16.