Table 3.
p value from the KS test comparing the distribution of the measured parameters from Fermi/GBM.
| Parameter | p value Observed | p value Detected at VHE | p value Detected at VHE (except GRB 190829A) |
|---|---|---|---|
vs. Population  |
vs. Population  |
vs. Population  |
|
| T90 | 0.79 (0.3σ) | 2.7 × 10−2 (2.2σ) | 6.0 × 10−2 (1.9σ) |
| Fluence | 0.62 (0.5σ) | 3.8 × 10−4 (3.6σ) | 1.1 × 10−6 (4.9σ) |
| 64 ms Peak Flux | 0.36 (0.9σ) | 1.6 × 10−5 (4.3σ) | 1.4 × 10−5 (4.3σ) |
| 1024 ms Peak Flux | 0.78 (0.3σ) | 4.4 × 10−6 (4.6σ) | 8.2 × 10−6 (4.4σ) |
Notes. The test is done between GRBs detected by both Swift/BAT and Fermi/GBM, those observed by H.E.S.S., and those detected at VHE. While T90 shows no significant deviation, the fluence and both 64 ms and 1024 ms peak fluxes for VHE-detected GRBs differ from the overall population, indicating these bursts tend to be brighter in the prompt phase.
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