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Spectral analysis of 35 GRBs/XRFs observed with HETE-2/FREGATE
C. Barraud, J-F. Olive, J. P. Lestrade +27
We present a spectral analysis of 35 GRBs detected with the HETE-2 gamma-ray detectors (the FREGATE instrument) in the energy range 7-400 keV. The GRB sample analyzed is made of GR…
FREGATE observation of a strong burst from SGR1900+14
J-F. Olive, K. Hurley, J-P. Dezalay +7
After a long period of quiescence, the soft gamma repeater SGR1900+14 was suddenly reactivated on April 2001. On July 2, 2001, a bright flare emitted by this source triggerred the…
In-flight verification of the FREGATE spectral response
J-F. Olive, J-P. Dezalay, J-L. Atteia +6
We present the first results of the in-flight validation of the spectral response of the FREGATE X/gamma detectors on-board the HETE-2 satellite. This validation uses the Crab puls…
In flight performance and first results of FREGATE
J-L. Atteia, M. Boer, F. Cotin +16
The gamma-ray detector of HETE-2, called FREGATE, has been designed to detect gamma-ray bursts in the energy range [6-400] keV. Its main task is to alert the other instruments of t…
GRB010921: Localization and Observations by the HETE Satellite
G. Ricker, K. Hurley, D. Lamb +36
On September 21 at 18950.56 SOD (05:15:50.56) UT the FREGATE gamma-ray instrument on the High Energy Transient Explorer (HETE) detected a bright gamma-ray burst (GRB). The burst wa…
HETE-II and the Interplanetary Network
K. Hurley, J. -L. Atteia, G. Crew +6
The FREGATE experiment aboard HETE-II has been successfully integrated into the Third Interplanetary Network (IPN) of gamma-ray burst detectors. We show how HETE's timing has been…