SN 2011fe synthesized light curves using the UBVRI_SNf filter set. Filled and open symbols stand for photometric and non-photometric nights respectively. The results of a SALT2 simultaneous fit of UBVR_SNf in the phase range −16 < t <  +25 d are shown as solid lines, along with the corresponding residuals (SALT2 – SNIFS) on the lower panel. The shaded areas represent the SALT2 model error. The residuals for the first points of U_SNf and B_SNf fall outside the panel, and the rms on the residuals for each band ignores the first 2 points. The break in the time axis corresponds to the ~50 day gap in follow-up during which SN 2011fe was not visible during the night from Hawaii. Note the change of scale of the extended time axis covering the late observations.