Open Access

Table 2

Comparison between the automated classification scheme based on the output of the SDSS pipeline (Bolton et al. 2012) and visual inspection of our training set.

Visual inspection Automated classification

UNKNOWN QSO STAR GALAXY
QSO 1418 17 687 27 107
QSO_BAL 144 946 4 8
QSO_? 79 27 6 26
QSO_Z? 120 41 5 7
Star 213 11 9804 189
Star_? 61 5 54 29
Galaxy 74 37 23 4623
? 115 15 34 95
Bad 169 30 44 204

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