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Fig. 4.

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Transfer function (Eq. (3)) of the best-fit model peaks at the time lag close to τcent, measured from the CCF method. But the mean lag (τmean) is longer because the transfer function has a long tail, which extends beyond the limit of the plot. The inset on the right displays the cloud distribution of the best-fit BLR model. The color code is the light-of-sight velocity.

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