Open Access
Table A.1.
Summary of the optical spectroscopic observations of AT2019aalc. δtf2 is time relative to the optical peak of the second flare.
| Date | Telescope | Instrument | Exp. time | Slit width | Seeing FWHM |
|---|---|---|---|---|---|
| (s) | (arcsec) | (arcsec) | |||
| Post-flare-1 | |||||
| 2021-07-06 | Keck-I | LRIS | 300 | 1.0 | 1.1 |
| Over-flare-2 | |||||
| 2023-06-15 | Keck-I | LRIS | 300 | 1.0 | 1.4 |
| 2023-06-22 | LDT | DeVeny | 800 | 1.5 | 1.2 |
| 2023-07-11 | Palomar Hale 5 m | DBSP | 180 | 1.5 | 1.5 |
| 2023-08-17 | Palomar Hale 5 m | DBSP | 900 | 1.5 | 1.1 |
| 2024-05-21 | Palomar Hale 5 m | DBSP | 1200 | 1.5 | 1.3 |
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