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Table 1.
Spectral properties of 5BZQ J1243+4043 across the three epochs.
| Spectrum | Component | Flux | Rest-frame EW | FWHM |
|---|---|---|---|---|
| 10−16 erg cm−2 s−1 Å−1 | Å | km s−1 | ||
| NOT #1 | Continuum | 1.34 ± 0.24 | − | − |
| C III | 3.47 ± 0.90 | 23.43 ± 2.11 | 6007.87 ± 90.12 | |
| Mg II | 2.01 ± 0.40 | 24.87 ± 2.98 | 6972.74 ± 146.43 | |
| LAMOST #2 | Continuum | 2.21 ± 0.49 | − | − |
| C IV | < 1.26 | − | 4000.00 (a) | |
| C III | < 1.72 | − | 4000.00 (a) | |
| Mg II | < 1.35 | − | 4000.00 (a) | |
| GTC #3 | Continuum | 0.30 ± 0.05 | − | − |
| C IV | 0.66 ± 0.07 | 36.30 ± 4.36 | 4774.69 ± 42.97 | |
| He II | 0.25 ± 0.04 | 1.74 ± 0.14 | 1254.48 ± 3.76 | |
| N III | 0.77 ± 0.13 | 2.82 ± 0.23 | 1499.47 ± 7.50 | |
| C III | 0.96 ± 0.14 | 25.10 ± 3.26 | 6152.56 ± 86.14 | |
| Mg II | 0.53 ± 0.08 | 51.87 ± 10.37 | 5628.52 ± 157.60 |
Notes. The first column reports the reference spectrum. The second, third, fourth and fifth columns list the spectral component with corresponding flux, either measured or limits, rest-frame EW and FWHM.
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