Left panel: CCFs of the integrated Hα(a) and Hβ(c) line, of their segments (center, blue, red), and of the central He I line (e) with respect to the combined continuum at 5180 Å (rest frame). The time lag, τ_cent, is denoted by a dashed line, with the shaded area corresponding to a ±1σ interval. The CCF of the spectroscopic continuum light curve with respect to the combined (photometric plus spectroscopic) continuum reference light curve is shown in (f). Right panel: CCCDs of the integrated Hα(b) and Hβ(d) line, of their segments (center, blue, red), and of the central He I line (g) with respect to the combined continuum at 5180 Å (rest frame). The boundary between CCCDs of individual peaks is denoted by a dashed gray line. The CCCD of the spectroscopic continuum light curve with respect to the combined continuum reference light curve is shown in (h).