Table 1.
Population properties (median and 16th and 84th percentiles as the error intervals) for the Swift sample and the subset of bursts fulfilling the sample criteria.
| Full Swift sample | Statistical sample | Followed up bursts | |
|---|---|---|---|
| NBAT | 981 | 163 | 92 |
| log(15 − 150 keV fluence) |
 |
 |
 |
| NXRT | 902 | 160 | 90 |
| log(0.3 − 10 keV flux) |
 |
 |
 |
| NHIx | 248 | 99 | 79 |
| log(NHIx) |
 |
 |
 |
Notes. The population characteristics of the three samples are very similar, which shows that our selection criteria effectively conserve the statistical properties of the underlying population, as least for these parameters. Notice that not all bursts have measurements of the quantities we compare.
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