Power-law fits to the GROND optical/NIR data at three epochs, corrected for a Galactic extinction of A_V = 0.24 mag. The uncorrected magnitudes are shown in a lighter shade below each corrected data point. We also show the fourth epoch, which only had detections in the g′ and r′ bands, as well as the detections (shown as diamonds) and limits from deep observations of the host galaxy at 285 days. Upper limits are shown as upside-down triangles.