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HETE Observations of the Gamma-Ray Burst GRB030329: 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. Dullighan
; T. Q. Donaghy
; E. E. Fenimore
; M. Galassi
; G. Pizzichini
; M . Matsuoka
; K. Takagishi
; K. Torii
; A. Yoshida
; M. Boer
; J.-P. Dezalay
; J.-F. Olive
; J. Braga
; R. Manchanda
; | | Date: |
15 Dec 2003 | | Journal: | Astrophys.J. 617 (2004) 1251-1257 | | Subject: | astro-ph | | Abstract: | 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. | | Source: | arXiv, astro-ph/0401311 | | Services: | Forum | Review | PDF | Favorites | |
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