Constraints on the very high energy Gamma-Ray emission with HAWC

TL;DR

This paper investigates the constraints on very high energy gamma-ray emission from gamma-ray bursts using HAWC data, focusing on the synchrotron self-Compton process during the afterglow phase and comparing theoretical models with upper limits.

Contribution

It provides a novel analysis of SSC emission constraints in GRBs at TeV energies, utilizing HAWC observations and theoretical modeling to explore parameter space.

Findings

Constraints on SSC emission parameters at z=0.3

Allowed microphysical parameter ranges identified

Fast cooling regime yields the most restrictive limits

Abstract

Gamma-ray bursts (GRBs) are among the most luminous sources in the universe. The nature of their emission at TeV energies is one of the most relevant open issues related to these events. The temporal and spectral features inferred from the early and late emissions usually known as prompt and afterglow, respectively, can be interpreted within the context of the fireball model. The synchrotron self-Compton process is expected during the afterglow phase. We explain how the theoretical SSC light curves can be compared with hypothetical upper limit located at z=0.3. We show the allowed parameter space of the microphysical parameters and density of the circumburst medium. The most restrictive results are obtained when the SSC process lies in the fast cooling regime