Left panel: light curves of GJ1214b gathered through the blue channel of LBC in the Bessel B band (blue points), and through the red channel in Bessel R (red points). Data points are plotted with the original sampling cadence. The black line corresponds to the best-fit model adopting the parameters listed in Table 2. Right panel: same as above, but showing the residuals from the best-fit model. The bump-like feature at phase 0.070 ≲ φ ≲ 0.092 appeared during the second transit and is interpreted as a starspot crossing; it is marked with an arrow in both channels.