Standard deviation of light-curve O–C residuals binned in different time resolutions, showing the level of time-correlated noise. Red dashed line indicates the expected Poisson-like noise, i.e., standard deviation of unbinned O–C residuals over square-root of N. Vertical dotted line shows corresponding ingress/egress duration. The number following the filter name indicates either primary transit (1) or occultation (2).