Gamma Ray Burst Prompt Emission Variability in Synchrotron and Synchrotron Self-Compton Lightcurves

Details Gamma Ray Burst Prompt Emission Variability in Synchrotron and Synchrotron Self-Compton Lightcurves Gamma Ray Burst Prompt Emission Variability in Synchrotron and Synchrotron Self-Compton Lightcurves

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aipc.1358...95r&link_type=abstract

GAMMA RAY BURSTS 2010. AIP Conference Proceedings, Volume 1358, pp. 95-97 (2011).

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Gamma-Rays, Magnetic Fields, Brightness, Acceleration, Gamma-Ray, Gravitational Radiation, Magnetic Fields, And Other Observations, Magnitudes And Colors, Luminosities, Particle Acceleration

Scientific paper

Gamma Ray Burst prompt emission is thought to have originated from electrons accelerated in internal shocks within a highly relativistic outflow. Radiation mechanism behind the bright γ-ray emission is debated. Likely candidates include synchrotron and inverse Compton processes. In this paper, we develop a `top-down' formalism by using observed quantities to infer physical parameters, and subsequently to study the temporal structure of synchrotron and synchrotron self-Compton components of a GRB. We find that the relative extent of small scale fluctuations differ in the two components. Small variations in the synchrotron lightcurve can be moderately amplified in the synchrotron self-Compton lightcurve. We apply our method to the bright naked-eye burst GRB080319B which has simultaneous optical and γ-ray lightcurves with comparable time resolution. We find that for the reasonable parameter space explored, γ-ray SSC lightcurve computed based on our analytical formalism is not as complex as the observed BAT lightcurve of GRB080319B.

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