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Table B.4.

Observed flux, EW and σ of the main forbidden emission lines in the wavelength range 6400 − 6800 Å (Sect. 3), in the same units as in Table B.1.

Year F[N II] EW[N II] σ[N II] F[S II]6716 EW[S II]6716 σ[S II]6716 F[S II]6731 EW[S II]6731 σ[S II]6731
2004/SDSS 28.8±0.5 22.0±0.3 280±10 9.1±0.4 7.0±0.3 270±10 9.4±0.4 7.2±0.3 290±10
2019/LR-B 30±10 21.0±0.2 300±40 11±5 7.8±0.1 290±40 11±4 7.9±0.1 300±40
2022/LR-B 29±5 18.7±0.6 360±90 76±2 5.1±0.4 330±90 8±4 5.4±0.7 320±90
2022/VHR-R 34.9±0.4 24.2±0.1 270±10 9.7±0.4 6.7±0.1 290±10 10.7±0.4 7.4±0.1 290±10

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