Accurate calorimetry of GRB 030329

D. A. Frail, A. M. Soderberg, S. R. Kulkarni, E. Berger, S. Yost, D. W. Fox, F. A. Harrison

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

We report late-time observations of the radio afterglow of GRB 030329. The light curves show a clear achromatic flattening at 50 days after the explosion. We interpret this flattening as resulting from the blast wave becoming transrelativistic. Modeling of this transition enables us to make estimates of the energy content of the burst, regardless of the initial jet structure or the distribution of initial Lorentz factors of the ejecta. We find, in accordance with other events, that GRB 030329 is well described by an explosion with total energy of a few×1051 ergs expanding into a circumburst medium with a density of order unity.

Original languageEnglish (US)
Pages (from-to)994-998
Number of pages5
JournalAstrophysical Journal
Volume619
Issue number2 I
DOIs
StatePublished - Feb 1 2005

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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