Left panel: toy model light curves for the single image D. The curves have been shifted in magnitude for visual purposes. The vertical ticks mark the observed peak luminosity. The black and purple curves overlap almost perfectly. Right panel: residuals of the microlensed V–R color curves with respect to the nonmicrolensed case. The corresponding position of the source in the microlensing map is indicated by colored circles in the left panel of Fig. 2. The insert shows the V–R color curves prior to the subtraction of the non microlensed color curves. All the curves are displayed in the supernova reference frame, i.e., there is no time rescaling due to the redshift of the supernova.