Open Access
Table 1.
Log of the spectroscopic observations of GRB 221009A.
| T–T0 | Wavelength range | Grism | Exposure | Instrument |
|---|---|---|---|---|
| (days) | (Å) | (s) | ||
| 0.391 | 3630–7500 | R1000B | 2 × 900 | GTC/OSIRIS |
| 0.409 | 5100–10 000 | R1000R | 2 × 300 | GTC/OSIRIS |
| 3.425 | 9500–24700 | 3500 | 12 × 220 | SOAR/TripleSpec |
| 9.157 | 3500–8500 | VPHG940 | 7 × 1200 | BTA/SCORPIO-2 |
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