Table 4.
Upper limits on the observed afterglow onset time tp, prompt duration T90, and peak energy Ep of the time-integrated νFν spectrum for five external-shock GRB candidates shown in Fig. 6.
| GRB | T90 (s) | tp (s) | Ep (keV) |
|---|---|---|---|
| 091018 | 4.4 | < 138 |
 |
| 110503A | 58.7 | < 275 | 220 ± 12 |
| 120811C | 24.3 | < 1020 | 49 ± 3 |
| 150314A | 14.8 | < 135 | 350 ± 10 |
| 200829A | 13.0 | < 100 | 336 ± 11 |
Notes. The upper limits on the afterglow onset times are from Ghirlanda et al. (2018) and Li et al. (2023). The peak energies are from Tsvetkova et al. (2017, 2021), Ridnaia et al. (2020). All values refer to the observer frame.
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