In both subpanels starting from top left: a) g_P1 band flux light curve (in units of 3631 Jy times 10⁸) with the solid blue line and cyan regions corresponding to the modeled light curve and 1σ error bands given the measured data (black points). b) Standardized residuals (black points) and their histogram in blue, overplotted with the expected standard normal distribution (orange line). c) and d) autocorrelation functions (ACF) of the standardized residuals (bottom left) and their square (bottom right) with the shaded region displaying the 95% confidence intervals assuming a white noise process. The top four panels show the data of the AGN with XID 2391 that is best fit by a CARMA(3,0) process. The bottom four panels show data of the AGN with XID 30 that is best fit by a CARMA(2,0) process.