Left: light curves of HAT-P-13b taken at the Asiago 1.82 m telescope, for the five transit summarized in Table 1. The unbinned photometric points are plotted in green, the 120-s binned points are plotted in black. The red line is the best-fit model fitted by JKTEBOP. Transits have been offset by intervals of 0.02 mag for clarity. Right: photometric residuals around the best-fit model.