Relative time-lag bias for the LS- and OB-type light curves (top and bottom panel, respectively), for various durations in experiment CD1. Filled squares indicate the mean relative time-lag bias over the full sampled frequency range, evaluated at the mean logarithmic frequency. The dashed vertical line in the top and bottom panel indicate ν_Nyq/ 2 for the LS- and OB-type light curves, respectively.