Top: comparison of the 2013 low-resolution SAAO spectrum (yellow) with two templates of similar spectral type. The spectrum of HR 5171 A is discrepant in lacking some Hα absorption (vertical dotted line). Bottom: comparison between the 1992 AAT echelle spectrum (purple dotted line) overplotted with the 2013 PUCHEROS spectrum (yellow curve). The spectra are very similar. The Hα and [N ii] λ6548 lines are indicated as vertical dotted and dashed lines, respectively.
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