Table A.2.
Emission line properties of AT2019aalc resulted from the fitting procedure. The δt is relative to the optical peak, F(BF) represents the flux of the N IIIλ4640+He IIλ4686 complex, and ncoronal gives the number of the detected high-ionization coronal lines. Superscripts specify which lines are detected, with their labels corresponding to (a) [Fe VII]λ6087, (b) [Fe X]λ6375, (c) [Fe XIV]λ5303, (d) [Fe XII]λ5721, and (e) [Fe XI]λ7892.
| Date | Instrument | Resolving power | δtf2 | F(BF)/F(Hβ) | ncoronal |
|---|---|---|---|---|---|
| (approx.) | (days) | ||||
| 2008-04-05 | SDSS | 1500-2500 | -11 years | 2a, b | |
| 2021-06-07 | LRIS | 1000 | -737 | 0.21 ± 0.01 | 4a, b, c, d |
| 2023-06-15 | LRIS | 1000 | -28 | 0.64 ± 0.02 | 4a, b, c, d |
| 2023-06-22 | Deveny | 750 | -21 | 0.50 ± 0.01 | 4a, b, c, d |
| 2023-07-11 | DBSP | 1000 | -2 | 0.83 ± 0.04 | 4a, b, c, d |
| 2023-08-17 | DBSP | 1000 | +35 | 0.25 ± 0.01 | 5a, b, c, d, e |
| 2024-05-21 | DBSP | 1000 | +315 | 0.30 ± 0.02 | 5a, b, c, d, e |
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