Standard gamma-ray bursts, dirty fireballs, and the excluded middle Academic Article uri icon


  • It is shown that the contribution of faint gamma-ray bursts (GRBs) to the total all-sky GRB energy flux is small. The all-sky flux of GRBs appears to be 5.3 × 10–3 erg cm–2 yr–1, with little additional component hidden within weak or otherwise undetectable GRBs. This significantly constrains physical models of GRBs and dirty fireballs, suggesting a rather sharp dichotomy between them should the latter exist.

publication date

  • January 1, 2011