Upper panel: comparison between the disk-integrated master (dashed line) and the local master (full line). Lower panel: difference between both CCFs. The vertical dashed lines show the normalization regions (outer two lines at v = 31.76 km s^-1 and v = 52.13 km s^-1), FWHM of the (middle two lines at v = γ ± 3.37 km s^-1), and systemic velocity γ (central line at v = 41.73 km s^-1).