Left panel: modeling of the T2/R (left plots) and T2/B (right plots) light-curve bumps. From the top: residual light curves with the best-fit Gaussian model overplotted (black line; Table 1), residuals from the Gaussian fit, and light curves of three reference stars with a red color and magnitude similar to GJ1214. Within the errors, the bump-like feature is not seen in any other light curve. Right panel: correlated noise diagrams (photometric RMS of the binned time series as a function of bin size) for the GJ1214b LBC residual light curves after the best-fit transit model has been subtracted. The lower sequence in the T2/B, T2/R plots is evaluated after the starspot feature has been masked out. The green lines follow a Poisson-like scaling law as extrapolated from the RMS of the unbinned curve (dotted-dashed line), and with a 50% increase as reference (dotted line).