Sum of EWs of the two strongest CaT lines for stars in 5 template globular clusters measured by Saviane et al. (2012) is plotted against our own measurements. The error bars were computed as in Vásquez et al. (2015). The one-to-one relation is shown as a black continuous line, whereas the dashed line is a linear fit to the data. The residuals from the one-to-one line are shown in the lower panel.
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