Root mean square for normalized light curves from three host stars of the sample, binned at various intervals (pink curve). The black line indicates the expected standard deviation, assuming pure additive Gaussian white noise, which scales as The deviation of the pink curve from the black line indicates the presence of correlated red noise at the corresponding timescales. Left panel: 61 Vir has a T_mag = 4.08. Middle panel: GJ 1061 has a T_mag = 9.47. Right panel: GJ 1132 has a T_mag = 12.14.