Black body fits to the spectral energy distribution. In the first two panels, representing early times, a single black body is sufficient to fit the SED, but in the final three panels, far later in the evolution of the SN, two black bodies are necessary. The r band data points were not included due to the influence of the strong Hα emission in this range. In each panel all points are from epochs within ten days of the listed phase, after interpolation. It should be noted that the second black body +92 d SED fit had an upper limit of 2500 K on the possible model temperatures and the model determined by the MCMC fitting is very close to this value. The horizontal bars on each point represent the bandwidths of the filters. The temperatures and radii of the black body fits used are given in each panel. This has been corrected for foreground extinction.