HETE observations of the gamma-ray burst GRB 030329: Evidence for an underlying soft X-ray component

R. Vanderspek, T. Sakamoto, C. Barraud, T. Tamagawa, C. Graziani, M. Suzuki, Y. Shirasaki, G. Prigozhin, J. Villasenor, J. G. Jernigan, G. B. Crew, J. L. Atteia, K. Hurley, N. Kawai, D. Q. Lamb, G. R. Ricker, S. E. Woosley, N. Butler, J. P. Doty, A. DullighanT. Q. Donaghy, E. E. Fenimore, M. Galassi, M. Matsuoka, K. Takagishi, K. Torii, A. Yoshida, M. Boer, J. P. Dezalay, J. F. Olive, J. Braga, R. Manchanda, G. Pizzichini

Research output: Contribution to journalArticlepeer-review

55 Scopus citations


An exceptionally intense gamma-ray burst, GRB 030329, was detected and localized by the instruments on board the High Energy Transient Explorer satellite (HETE) at 11:37:14 UT on 2003 March 29. The burst consisted of two ∼10 s pulses of roughly equal brightness and an X-ray tail lasting more than 100 s. The energy fluence in the 30-400 keV energy band was Sγ = 1.2 × 10-4 ergs cm-2, making GRB 030329 one of the brightest GRBs ever detected. Communication of a 2́ error box 73 minutes after the burst allowed the rapid detection of a counterpart in the optical, X-ray, and radio and the ensuing discovery of a supernova with most unusual characteristics. Analyses of the burst light curves reveal the presence of a distinct, bright, soft X-ray component underlying the main GRB; the 2-10 keV fluence of this component is ∼7×10-6 ergs cm-2. The main pulses of GRB 030329 were preceded by two soft, faint, nonthermal bumps. We present details of the HETE observations of GRB 030329.

Original languageEnglish (US)
Pages (from-to)1251-1257
Number of pages7
JournalAstrophysical Journal
Issue number2 I
StatePublished - Dec 20 2004
Externally publishedYes


  • Gamma rays: bursts
  • X-rays: individual (GRB 030329)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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