Determination of the EW from the CaT, using continuum-normalized spectra in the case of a metal-rich target (upper two panels) and a metal-poor star (lower two panels). A combination of a Gaussian and a Lorentzian function (black line) is fit to the absorption features in order to account for the strong damping wings, particularly for the metal-rich stars. The plotted wavelength range represents the adopted line bandpasses. The S/N of both targets is ~ 30, a typical value for our sample.