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Fig. B.1

image

Top panel: ALFOSC spectrum of LP 714-47 (blue) and the MaStar spectrum (orange) of star mastar-LOG-8816-1270 (degraded to the spectral resolution of our data). The comparison star has a slightly sub-solar metallicity (Yan et al. 2019). The ALFOSC spectrum is not corrected for the telluric contribution, while the MaStar spectrum is telluric-free. Some atomic and molecular features are identified. Bottom panel: LP 714-47 (blue) compared to an M2V standard star (from Alonso-Floriano et al. 2015).

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