Top panel: ULTRACAM r-band light curve from 16 May 2005 with the best-fit model to the eclipse phases shown in gray (and extended to the full orbit). The individual components of the model are also shown: white dwarf (blue dashed line), donor star (red dot-dashed line), cyclotron spot (green dotted line). Bottom panel: Light curve with the white dwarf and donor star contributions removed, thus mainly showing cyclotron emission.