Same as Fig. B.1, but for a FEROS observation of the star NGC 3293-007. This is an example of a model fit to a nitrogen-poor evolved star (Hunter et al. 2009). Except for the hydrogen Balmer lines (Hα is filled by wind emission) the fit to all lines, and in particular to the N ii lines, is poor. This indicates a poor choice for the stellar parameters, implying that the derived abundances are subject to systematic bias.
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