CaII (H&K) index (left panel) and CO1.64 index (right panel) for the two data reductions, DR3 (blue) and B24 (orange). The measurements of the former (latter) index are consistent (inconsistent) when measured from the two data reductions. In both panels, the white central region is the wavelength region where the feature is measured, while blue and red regions are the blue and red continuum bandpasses, respectively.