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Fig. 1

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In the top panel, we show the comparison between the effective temperatures derived from our standard spectroscopy analysis and the ones derived using the line-ratio code for the sample used to derive the calibration (labelled Cal. Sample in the plot adapted from Sousa et al. 2010). In the bottom plot, we show a similar plot but this time for the sample of stars presented in Sousa et al. (2011). This corresponds to a sample that is independent of the derived calibration. In both panels, we present the mean difference and the standard deviation for the comparisons.

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