Like Fig. 8, for 3C 454.3 before 2005.2 (left panel) and after 2005.2 (right panel). During the “quiescent” phase before 2005.2, the peak of the DCF is in good agreement with a time delay of zero. We note the low absolute value of the correlation, DCF(0) ≈ 0.6. For the “flaring” phase after 2005.2, we find a significant time delay in the range (as defined by the 3σ confidence interval) of  ~ −15...−80 days, peaking at τ ≈ −55 days. The negative delay indicates that the 1.3-mm lightcurve is ahead in time of the 3-mm lightcurve.