2 v 1 1 J an 1 99 7 Variability in GRBs - A Clue Re ’ em Sari Tsvi Piran

  • Sari Tsvi Piran
  • Published 2008


We show that external shocks cannot produce a variable GRB, unless they are produced by an extremely narrow jets (angular opening of < ∼ 10) or if only a small fraction of the shell emits the radiation and the process is very inefficient. Internal shocks can produce the observed complex temporal structure provided that the source itself is variable. In this… (More)


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