In flight performance and first results of FREGATE

D. Lagrange; F. Cotin; G. Crew; G. Ricker; G. Rouaix; G. Vedrenne; J. Couteret; J. Doty; J. Evrard; J-F Olive

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In flight performance and first results of FREGATE

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arxiv astro-ph/0202515 v1 pith:E7YXTJNN submitted 2002-02-28 astro-ph

J-L. Atteia , M. Boer , F. Cotin , J. Couteret , J-P. Dezalay , M. Ehanno , J. Evrard , D. Lagrange

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M. Niel J-F Olive G. Rouaix P. Souleille G. Vedrenne K. Hurley G. Ricker R. Vanderspek G. Crew J. Doty N. Butler

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keywords fregategamma-raybeenfirsthete-2mainperformancealert

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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 the occurrence of a gamma-ray burst (GRB) and to provide the spectral coverage of the GRB prompt emission in hard X-rays and soft gamma-rays. FREGATE was switched on on October 16, 2000, one week after the successful launch of HETE-2, and has been continuously working since then. We describe here the main characteristics of the instrument, its in-flight performance and we briefly discuss the first GRB observations.

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