Example lightcurves with maximum evidence for constant model with additional noise (first row), for sinusoid with flat prior in period (second row), for two sinusoids (third row), for Wiener process (fourth row), for OU process (fifth row), and for Cauchy CAR(1) process (sixth row). In order to facilitate comparison for this figure, all lightcurves have been standardised by subtracting the mean and dividing by the standard devition. Numbers in the top right corners of each panel provide this QSO’s ID from Ivezić et al. (2007).