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Table 2.
Median EWs and uncertainties for the most relevant spectral lines in the three QSO sub-samples.
| Spectral line | Sint | Wint | Iso | |||
|---|---|---|---|---|---|---|
| [NeV]λ3426 | 3.67 ± 0.23 | 173 | 3.47 ± 0.17 | 309 | 3.42 ± 0.19 | 1450 |
| [OII]λ3727 | 4.09 ± 0.34 | 96 | 4.05 ± 0.35 | 162 | 4.00 ± 0.31 | 663 |
| [OII]λ3730 | 4.93 ± 0.38 | 171 | 4.35 ± 0.30 | 284 | 4.11 ± 0.34 | 1353 |
| Hδ | 8.55 ± 0.82 | 201 | 8.94 ± 0.80 | 349 | 8.55 ± 0.62 | 1612 |
| Hγ | 14.58 ± 1.06 | 312 | 14.93 ± 1.22 | 572 | 14.89 ± 1.09 | 2699 |
| [OIII]λ4363 | 4.45 ± 0.29 | 276 | 4.30 ± 0.27 | 513 | 4.42 ± 0.30 | 2436 |
| Hβ | 37.88 ± 2.75 | 381 | 37.21 ± 2.31 | 732 | 37.66 ± 2.72 | 3399 |
| [OIII]λ4959 | 8.63 ± 1.02 | 337 | 7.39 ± 0.74 | 604 | 7.18 ± 0.74 | 2856 |
| [OIII]λ5007 | 19.92 ± 2.23 | 386 | 15.77 ± 1.44 | 738 | 16.32 ± 1.57 | 3477 |
| MgIλ5177 | 9.44 ± 0.52 | 163 | 9.29 ± 0.80 | 314 | 9.99 ± 0.62 | 1429 |
| NaIλ5896 | 4.34 ± 0.23 | 127 | 4.56 ± 0.24 | 226 | 4.65 ± 0.20 | 1074 |
| [NII]λ6548 | 29.48 ± 3.63 | 376 | 28.04 ± 3.78 | 727 | 28.93 ± 3.61 | 3391 |
| H α | 248.56 ± 24.33 | 386 | 235.73 ± 24.42 | 745 | 231.57 ± 26.35 | 3494 |
| [NII]λ6583 | 26.85 ± 2.82 | 380 | 25.27 ± 2.31 | 716 | 26.49 ± 2.75 | 3363 |
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