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Fig. 1

image

Comparison of the FLAMES/GIRAFFE (black line) and the combined HARPSpol Stokes I spectrum (grey line) of CPD −57° 3509 for several strategic lines, as indicated. The observed spectra were cross-correlated with the model spectrum computed for our final set of parameters to determine the barycentric radial velocity, and shifted to the laboratory frame for the comparison. See the text for further discussion.

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