Gamma-ray burst beaming constraints from afterglow light curves

J. E. Rhoads

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


The beaming angle ζm is the main uncertainty in gamma ray burst energy requirements today. We summarize predictions for the light curves of beamed bursts, and model the R band light curve of GRB 970508 to derive ζm ≳ 30°. This yields an irreducible minimum energy requirement of 3.4 1049 ergs to power the afterglow alone.

Original languageEnglish (US)
Pages (from-to)539-540
Number of pages2
JournalAstronomy and Astrophysics Supplement Series
Issue number3
StatePublished - Sep 1999


  • Gamma-ray: bursts

ASJC Scopus subject areas

  • General Physics and Astronomy


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