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Article: Study results from T. Le and colleagues in the area of astronomy published.
- Article from:
- Defense & Aerospace Week
- Article date:
- August 26, 2009
CopyrightCOPYRIGHT 2009 NewsRX. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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"of a phenomenological model to estimate the gamma-ray burst (GRB) detection rate by the Fermi Gamma-Ray Space Telescope are reported. This estimate is based on the Burst and Transient Source Experiment (BATSE) 4B GRB fluence distribution, the mean ratio of fluences measured at 100 MeV-5 GeV with Energetic Gamma-Ray Experiment Telescope (EGRET) and at 20 keV-2 MeV with BATSE, and the mean EGRET GRB spectrum for the five EGRET spark-chamber GRBs," investigators in the United States report.
"For a 10% fluence ratio and a number spectral index alpha(1) = -2 at 100 MeV-5 GeV energies, we estimate a rate of approximate to 20 and 4 GRBs yr(-1) in the Fermi Large Area ...