Fermi/GBM observations of the ultra-long GRB 091024

Details Fermi/GBM observations of the ultra-long GRB 091024 Fermi/GBM observations of the ultra-long GRB 091024

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aipc.1358...29g&link_type=abstract

GAMMA RAY BURSTS 2010. AIP Conference Proceedings, Volume 1358, pp. 29-32 (2011).

Computer Science

Gamma-Rays, Shock Waves, Photons, Spectral Analysis, Gamma-Ray, Planetary Bow Shocks, Interplanetary Shocks, Photons, Luminosities, Magnitudes, Effective Temperatures, Colors, And Spectral Classification

Scientific paper

We examine gamma-ray and optical data of GRB 091024, a gamma-ray burst (GRB) with an extremely long duration of T90~1020 s, as observed with the Fermi Gamma-Ray Burst Monitor (GBM). We present spectral analysis of all three distinct emission episodes using data from Fermi/GBM. and compare the optical and gamma-ray light curves of this event. We find that the optical light curve is highly anti-correlated to the prompt gamma-ray emission, with the optical emission reaching the maximum during an epoch of quiescence in the prompt emission. We interpret this behavior as the reverse shock (optical flash).

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