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An exceptionally intense gamma-ray burst, GRB030329, was detected andlocalized by the instruments on board the High Energy Transient Explorersatellite (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. Theenergy fluence in the 30-400 keV energy band was 1.08e-4 erg/cm2, makingGRB030329 one of the brightest GRBs ever detected. Communication of a 2 arcminerror box 73 minutes after the burst allowed the rapid detection of acounterpart in the optical, X-ray, radio and the ensuing discovery of asupernova with most unusual characteristics. Analyses of the burst lightcurvesreveal the presence of a distinct, bright, soft X-ray component underlying themain GRB: the 2-10 keV fluence of this component is ~7e-6 erg/cm2. The mainpulses of GRB030329 were preceded by two soft, faint, non-thermal bumps. Wepresent details of the HETE observations of GRB030329.Comment: 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 include

HETEObservations of the Gamma‐Ray Burst GRB 030329: Evidence for an Underlying Soft X‐Ray Component