CTIO VR_CI_C photometry with the best-fit model light curves. Top panel: CTIO time-series photometry of MML 53, from the top are the V–, R_C–, and I_C–band differential photometry measurements shown by the black points with individual error. The light curves were arbitrarily separated in Δmag for clarity. The model light curves corresponding to the final solution, including third light and stellar spots (Sect. 3.2.1), are shown by the continuous red lines. Three bottom panels: residuals to the best fit model for each of the light curves, V, R_C, and I_C, respectively from the top. Our solution is able to reproduce well the duration and depth of the eclipses in the different bands and the variation attributed to spots. The rms in the residuals in each filter (∼8 mmag) are comparable to the errors in the photometric measurements.