Typical example of a simulated noise transit light curve (upper panel, red), its lfit solution (upper panel, blue) and the residuals (lower panel). Note: both during the ingress an egress phases, the blue curve is shifted to the left of the simulated points, meaning that purely the presence of correlated noise can induce TTV-like phenomena. The difference between the simulated and best-fit curves during these phases is emphasised using the two inset plots.