Fig. 2.

Left panel: impact of sky subtraction for 2MASS J00595966−3339319 on temperature and metallicity. The dashed line indicates the literature value of Skúladóttir et al. (2015). Middle panel: impact of noise on the stellar parameters for the benchmark star HD 26297. The shaded bands indicate a one sigma spread after 20 repetitions of analysis. The signal-to-noise ratio (S/N) is given per resolution element. Right panel: uncertainty due to different radial velocity shifts for star 2MASS J00595966−3339319.
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