Computer Science
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aipc..727..236g&link_type=abstract
GAMMA-RAY BURSTS: 30 YEARS OF DISCOVERY: Gamma-Ray Burst Symposium. AIP Conference Proceedings, Volume 727, pp. 236-239 (2004).
Computer Science
3
Gamma-Ray Sources, Gamma-Ray Bursts, Photometric, Polarimetric, And Spectroscopic Instrumentation, Spaceborne And Space Research Instruments, Apparatus, And Components
Scientific paper
Analysis of the time evolution of GRB spectra yields important information about the radiation mechanisms taking place in Gamma-Ray Bursts. Spectroscopy of BATSE data using the Band function showed a generalized hard-to-soft temporal evolution of the GRB spectra. This analysis was limited to bursts whose spectrum peaks below 1 MeV. The EGRET's calorimeter TASC (Total Absorption Shower Counter) was sensitive to energies above 1 MeV and beyond 10 MeV for brighter bursts. In order to give better spectral fits over a broader energy range, we have combined BATSE and TASC data for 8 bursts that showed significant detection in more than one time interval in TASC data. We observed that the spectrum of a single peak evolves from hard-to-soft, except for one burst where the high-energy spectral index β stayed constant with time. For bursts with multiple peaks, no evident time evolution was observed.
Briggs Michael Stephen
Dingus Brenda Lynn
Gonzalez Martinez M.
Kaneko Yasushi
Preece Rob D.
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