Comparison of the automatic classification and the one after re-inspection of the spectra (corrected classification) for all stars classified by both methods for M 8. The corrected classification corresponds to either the automatic classification or the classification by eye depending on each specific case (see column four in Table 4). The red triangles represent dwarfs (IV-V), and the green circles (super)giants (I-III) according to the automatic classification. Full symbols signify agreement in luminosity class with the corrected classification. The outliers in the bottom-right of the plot correspond to the early B-type stars that are misclassified as F-type by the automatic method.
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