Open Access
Table 2.
Optical spectroscopic observations of J0428−00 during 2020–2023.
| Date | Date | Instrument (Telescope) | Slit width | Seeing | Exposure | |
|---|---|---|---|---|---|---|
| (MJD) | (″) | (″) | (s) | |||
| S1 | 58871 | 2020-01-23 | LRIS+LRISBLUE (Keck) | 1.0 | 0.46 | 600 |
| S2 | 58905 | 2020-02-26 | DeVeny (LDT) | 1.5 | 1.5 | 1800 |
| S3 | 59105 | 2020-09-13 | DeVeny (LDT) | 1.5 | 1.5 | 1700 |
| S4 | 59189 | 2020-12-06 | DeVeny (LDT) | 1.5 | 1.5 | 2400 |
| S5 | 59468 | 2021-09-11 | SpUpNIC (SAAO) | 2.7 | ∼2.5 | 2400 |
| S6 | 59586 | 2022-01-07 | RSS (SALT) | 1.5 | 2.7 | 540 |
| S7 | 59660 | 2022-03-22 | FORS2 (VLT) | 1.3 | < 1.3 | 900 |
| S8 | 59828 | 2022-09-06 | DBSP | 1.5 | 1.5 | 600 |
| S9 | 59881 | 2022-10-29 | RSS (SALT) | 1.5 | 1.4 | 500 |
| S10 | 59883 | 2022-10-31 | RSS (SALT) | 1.5 | 3.5–4.5 | 720 |
| S11 | 60018 | 2023-05-15 | FORS2 (VLT) | 1.3 | < 1.3 | 900 |
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