GRBs in the SWIFT and Fermi era: a new view of the prompt emission

TL;DR

This paper introduces a new log-parabolic model to explain the curved spectral energy distributions of Gamma Ray Bursts, offering an alternative to the traditional Band function, based on observations from the SWIFT and Fermi telescopes.

Contribution

The paper proposes a novel log-parabolic spectral model for GRBs, providing a different interpretation of their prompt emission spectra compared to the established Band function.

Findings

Log-parabolic model fits GRB spectra well

Offers a new perspective on GRB prompt emission

Potentially improves understanding of GRB physics

Abstract

Gamma Ray Bursts (GRBs) show evidence of different light curves, duration, afterglows, host galaxies and they explode within a wide redshift range. However, their spectral energy distributions (SEDs) appear to be very similar showing a curved shape. In 1993 Band et al. proposed a phenomenological description of the integrated spectral shape for the GRB prompt emission, the so called Band function. We present an alternative scenario to explain the curved shape of GRB SEDs: the log-parabolic model.