GMOS white light curves for the B600 observation (top left), R150 observation 1 (top right), R150 observation 2 (bottom left) and R150 observation 3 (bottom right). Each plot shows the target’s light curve divided by that of the reference star after correcting for systematics. In each case, the best-fitting transit model is shown. Error bars on the light curves are the initial uncertainties from photon noise. Error bars in the residuals are rescaled after the fit using the f parameter (see the text).