Sensitivity of the FREGATE Experiment

Details Sensitivity of the FREGATE Experiment Sensitivity of the FREGATE Experiment

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aipc..662...73d&link_type=abstract

GAMMA-RAY BURST AND AFTERGLOW ASTRONOMY 2001: A Workshop Celebrating the First Year of the HETE Mission. AIP Conference Proceed

Astronomy and Astrophysics

Astronomy

1

X- And Gamma-Ray Telescopes And Instrumentation, Gamma-Ray Sources, Gamma-Ray Bursts, Spaceborne And Space Research Instruments, Apparatus, And Components

Scientific paper

During the first year of operation, the FREGATE instrument onboard HETE-2 has detected a large number of Gamma-Ray Bursts in the 6-400 keV energy range. In this paper, the sensitivity of FREGATE is computed in various energy ranges using several parameters such as the observed background, the angle of arrival of the photons on the detector, and the trigger criteria. From the current list of GRB candidates and with the duty cycle of FREGATE, we estimate the instrument burst detection rate within the field of view. The sensitivity and the burst rate are in good agreement with preflight simulations and with the results of previous experiments.

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