Fig. 3.
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Stacked spectra for all the sources with a radial velocity > 600 km s−1 (421 sources, top) and <−600 km s−1 (349 sources, bottom). Solid vertical lines indicate the position of the calcium triplet, and dashed lines show the same lines shifted by 1.7 nm, indicating where the spectral line would be if the radial velocity correction were incorrect by 600 km s−1.
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