The Viability of the Synchrotron Shock Model as a Prompt Emission Mechanism in the era of Fermi

Astronomy and Astrophysics – Astronomy

Scientific paper

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Gamma-Ray Sources (Astronomical), Spectral Analysis, Spectroscopy, Synchrotrons, Gamma-Ray Sources, Gamma-Ray Bursts, Luminosities, Magnitudes, Effective Temperatures, Colors, And Spectral Classification, Spectroscopy And Spectrophotometry, Synchrotrons

Scientific paper

The Synchrotron Shock Model (SSM) has been proposed as a possible prompt emission mechanism for gamma-ray bursts (GRBs). We examine the ability of this model to quantitatively explain the measured spectra of GRBs detected with the Fermi Gamma-ray Burst Monitor (GBM). Using a parameterized post-shock electron distribution (Baring 2004), we calculate the full synchrotron differential photon flux and convolve it with the response of the GBM detectors. With this model, we perform detailed time-resolved and time-integrated spectral analysis of GRB 090820A and examine the electron distributions inferred by the recovered fit parameters. These electron distributions are compared to those expected to be produced by the Fermi acceleration process.

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