The X-ray (black), optical (blue) and near-infrared (red) light curves of the short-duration GRB130603B.  The early emission at all wavelengths is dominated by the bright but rapidly fading afterglow.  Extrapolating this forward to ~ 10 days post trigger, an excess is seen at near-infrared but not optical wavelengths, consistent with theoretical predictions for a kilonova.  From \cite{Tanvir2013}.