Time delay as a function of BLR contribution for different BLR response functions. Dashed lines show the linear interpolation between the extreme cases of no BLR contribution to time delay and 100% of disk photons reprocessed by the BLR. Points show the intermediate delays calculated from stochastic light curves using ICCF between X-ray light curve and 7961.59 Å for different shapes of the BLR transfer function: A = Gaussian (τ_peak = 20, σ = 5); C = half-Gaussian (τ_peak = 5, σ = 5); E = half-Gaussian2 (τ_peak = 5, σ = 10); G = half-Gaussian3 (τ_peak = 5, σ = 3); K = half-Gaussian4 (τ_peak = 5, σ = 7); and I = half-Gaussian5 (τ_peak = 5, σ = 15). All values of τ_peak and σ given in days. Solid lines show the ICCF delay measured between X-ray light curve and 7961.59 Å light curve by varying the BLR contribution using different BLR response function (B = Gaussian, D = half-Gaussian, F = half-Gaussian2, H = half-Gaussian3, J = half-Gaussian4, and L = half-Gaussian5). All data points are summarized in Table 1.