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Observational constraints on the afterglow of GRB 020531
Alain Klotz, Michel Boer, Jean-Luc Atteia
We present the data acquired by the TAROT automated observatory on the afterglow of GRB 020531. Up to now, no convincing afterglow emission has been reported for this short/hard GR…
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…
XMM-Newton observation of the distant (z=0.6) galaxy cluster RX J1120.1+4318
M. Arnaud, S. Majerowicz, D. Lumb +12
We report on a 20 ksec XMM observation of the distant cluster RXJ1120.1+4318, discovered at z=0.6 in the SHARC survey. The cluster has a regular spherical morphology, suggesting it…
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…