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Fig. 2

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Optical to red SED of M dwarfs from M0 to M9.5 observed with the NTT at a spectral resolution of 10.4 Å compared to the best fit BT-Settl synthetic spectra (red lines). The models displayed have a surface gravity of log g = 5.0 to 5.5. Telluric features near 7600 Å were ignored from the chi-square minimization.

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