tokens: ACKNOWLEDGEMENTS The authors would like to thank John Pritchard of ESO Operations Support for his assistance with the wavelength calibration of the spectra. Based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere under ESO programme 095.B-0133(A). This paper includes data gathered with the 6.5m Magellan Telescopes located at Las Campanas Observatory, Chile. This work makes use of PyAstronomy and emcee . DRW is supported by a fellowship from the Alfred P. Sloan Foundation. NFM acknowledges that this work has been published under the framework of the IdEx Unistra and benefits from a funding from the state managed by the French National Research Agency as part of the investments for the future programme. NFM also acknowledge support by the Programme National Cosmology et Galaxies (PNCG) of CNRS/INSU with INP and IN2P3, co-funded by CEA and CNES.
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