HETE Observations of the Gamma-Ray Burst GRB 030329: Evidence for an Underlying Soft X-Ray Component
| Autor: | J. L. Atteia, Masaya Suzuki, E. E. Fenimore, S. E. Woosley, T. Tamagawa, D. Q. Lamb, George R. Ricker, J. G. Jernigan, Nat Butler, G. Pizzichini, M. Galassi, Y. Shirasaki, T. Q. Donaghy, N. Kawai, G. Prigozhin, J. Villasenor, C. Graziani, K. Takagishi, Kazufumi Torii, R. Vanderspek, João Braga, A. Dullighan, Atsumasa Yoshida, John P. Doty, C. Barraud, R. K. Manchanda, T. Sakamoto, M. Matsuoka, J. F. Olive, M. Boer, K. Hurley, G. Crew, J. P. Dezalay |
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| Jazyk: | angličtina |
| Rok vydání: | 2004 |
| Předmět: |
Physics
Brightness Soft x ray High Energy Transient Explorer Astrophysics::High Energy Astrophysical Phenomena Astrophysics (astro-ph) X-rays: individual (GRB 030329) FOS: Physical sciences Astronomy and Astrophysics Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Fluence On board Gamma Rays: Bursts Supernova Space and Planetary Science Gamma-ray burst Erg |
| Zdroj: | Astrophysical Journal. 617:1251-1257 |
| Popis: | An exceptionally intense gamma-ray burst, GRB030329, was detected and localized by the instruments on board the High Energy Transient Explorer satellite (HETE) at 11:37:14 UT on 29 March 2003. The burst consisted of two \~10s pulses of roughly equal brightness and an X-ray tail lasting >100s. The energy fluence in the 30-400 keV energy band was 1.08e-4 erg/cm2, making GRB030329 one of the brightest GRBs ever detected. Communication of a 2 arcmin error box 73 minutes after the burst allowed the rapid detection of a counterpart in the optical, X-ray, radio and the ensuing discovery of a supernova with most unusual characteristics. Analyses of the burst lightcurves reveal the presence of a distinct, bright, soft X-ray component underlying the main GRB: the 2-10 keV fluence of this component is ~7e-6 erg/cm2. The main pulses of GRB030329 were preceded by two soft, faint, non-thermal bumps. We present details of the HETE observations of GRB030329. 22 pages, 5 figures, to be published in ApJ 617, no. 2 (10 December 2004). Referee comments have been incorporated; results of improved spectral analysis are included |
| Databáze: | OpenAIRE |
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