Theoretical interpretation of luminosity and spectral properties of GRB 031203

TL;DR

This paper demonstrates how a thermal emission model in the fireshell's co-moving frame can explain the non-thermal spectrum observed in GRB 031203, providing a theoretical interpretation of its luminosity and spectral features.

Contribution

It introduces a theoretical framework linking thermal co-moving emission to observed non-thermal spectra in GRBs, specifically applied to GRB 031203.

Findings

Thermal emission in the co-moving frame can reproduce observed non-thermal spectra.

Application to GRB 031203 supports the model's validity.

Provides a theoretical basis for interpreting GRB spectral properties.

Abstract

We show how an emission endowed with an instantaneous thermal spectrum in the co-moving frame of the expanding fireshell can reproduce the time-integrated GRB observed non-thermal spectrum. An explicit example in the case of GRB 031203 is presented.