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Table 3.
Spectroscopic observations and emission-line-fitting results.
| Obs. log | SDSS | P200 | P200 | YFOSC | YFOSC | YFOSC |
|---|---|---|---|---|---|---|
| Obs. date | 2002 Dec | 2018 Feb | 2020 Feb | 2020 April | 2021 Jan | 2021 May |
| Seeing (arcsec) | 1.78–2.2 | 3.3 | 1.5 | 2.1 | 1.7 | 2.1 |
| Aperture width (arcsec) | 3 (†) | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 |
| Spectral resolution (λ/Δλ) (‡) | 1780 | 1080 | 1080 | 380 | 380 | 810 |
| Exposure (second) | 3000 | 2700 | 800 | 1800 | 1800 | 2400 |
| Parameters | ||||||
| Hαb (10−14 erg cm−2s−1) | 0.85 ± 0.60 | 1.25 ± 0.1 | 2.8 ± 0.09 | 2.6 ± 0.08 | 2.0 ± 0.23 | 1.7 ± 0.01 |
| Hαm (10−14 erg cm−2s−1) | 1.42 ± 0.07 | 2.76 ± 0.1 | 4.1 ± 0.1 | 4.1 ± 0.09 | 3.4 ± 0.27 | 2.9 ± 0.01 |
| Hαn (10−14 erg cm−2s−1) | 0.39 ± 0.04 | 0.39 ± 0.01 | 0.39 ± 0.01 | 0.39 ± 0.01 | 0.39 ± 0.01 | 0.39 ± 0.01 |
| FWHM [Hαb] (km s−1) | 2860 ± 170 | 3380 ± 512 | 2653 ± 111 | 2790 ± 92 | 3046 ± 236 | 3476 ± 32 |
| FWHM [Hαm] (km s−1) | 807 ± 38 | 1034 ± 32 | 846 ± 13 | 892 ± 11 | 911 ± 21 | 920 ± 2.5 |
| FWHM [Hαn] (km s−1) | 318 ± 15 | 318 (f) | 318 (f) | 318 (f) | 318 (f) | 318 (f) |
| Hβb (10−15 erg cm−2s−1) | 6.7 ± 0.3 | 7.8 ± 1.6 | 7.5 ± 0.9 | 7.4 ± 0.6 | 7.9 ± 2.0 | 7.4 ± 0.2 |
| Hβm (10−15 erg cm−2s−1) | 3.2 ± 0.4 | 4.9 ± 1.6 | 5.6 ± 0.9 | 6.3 ± 0.5 | 5.5 ± 2.2 | 5.5 ± 0.3 |
| Hβn (10−15 erg cm−2s−1) | 1.3 ± 0.3 | 1.3 ± 0.1 | 1.3 ± 0.08 | 1.3 ± 0.01 | 1.3 ± 0.01 | 1.3 ± 0.01 |
| FWHM [Hβb] (km s−1) | 2721 ± 154 | 2821 ± 625 | 2449 ± 213 | 2787 ± 36 | 2562 ± 222 | 2099 ± 87 |
| FWHM [Hβm] (km s−1) | 736 ± 67 | 746 ± 88 | 920 ± 86 | 860 ± 62 | 866 ± 229 | 650 ± 24 |
| FWHM [Hβn] (km s−1) | 318 ± 15 | 318 (f) | 318 (f) | 318 (f) | 318 (f) | 318 (f) |
| L5100 Å (1043 erg cm−1) | 6.6 ± 1.0 | 4.2 ± 1.0 | 4.05 ± 1.0 | 3.7 ± 1.0 | 3.8 ± 1.0 | 4.9 ± 1.0 |
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