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Table 1
Classification from the visual inspection corresponding to the combination of class_person (first column) and z_conf_person (first row) values provided in the headers of the SDSS-DR9 spectra available from the SDSS Catalog Archive Server.
| z_conf_person | 0 | 1 | 2 | 3 |
| / | ||||
| class_person | ||||
|
|
||||
| 0 | Not inspected | ? | – | – |
| 1 | – | – | Star_? | Star |
| 3 | – | QSO_? | QSO_Z? | QSO |
| 4 | – | – | – | Galaxy |
| 30 | – | – | – | QSO_BAL |
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