Fit to CaT lines A: 8498 Å; B: 8542 Å, and C: 8662 Å for star 1378 as example. The shaded gray areas show the local continuum regions and the shaded orange areas show the line region defined by Vásquez et al. (2015). The black lines and dots trace the observed spectrum in the rest frame and the blue lines are the best model fit to the data, using a sum of Gaussian and Lorentzian functions. The spectrum has been locally normalized using the highlighted local continuum regions before the fitting. In this analysis we only use the sum of the equivalent widths of the two strongest lines (B+C) following the recipe of Vásquez et al. (2015, 2018).