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Fig. 5

image

Differences in the λ1 parameter obtained with the INT/NOT spectra and the FAST spectra convolved with different Gaussian widths ranging from 1.5 to 8Å, at steps of 0.5Å, for a subset of the stars in common between the two samples. Each colour represents a spectrum and the minimum of the Δλ1 difference corresponds to the convolution that best fits the INT/NOT spectrum.

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