PoS - Proceedings of Science
Volume 444 - 38th International Cosmic Ray Conference (ICRC2023) - Gamma-ray Astronomy (GA)
Modeling of Gamma Ray Burst (GRB) Afterglow at Very High Energy (VHE) regime
T. Mondal*, L. Resmi and D. Bose
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Pre-published on: July 25, 2023
Published on:
Abstract
MAGIC and HESS’s detection of delayed VHE gamma-rays from Gamma-Ray Bursts (GRBs) has demonstrated the promising future of GRB afterglow studies with the Cherenkov Telescope Array (CTA). We have developed a model where we have explored the afterglow parameter space to see the detectability of sub-TeV photons by CTA. The spectral energy distribution is computed using a one-zone electron synchrotron and a synchrotron self-Compton model at a given redshift. We find that jets with high kinetic energy decelerating into a dense ambient medium are better candidates for CTA. In this paper, we have applied our model to fit the spectrum of a long GRB detected by MAGIC. The result indicates that our model can well fit EBL attenuated MAGIC afterglow spectrum.
DOI: https://doi.org/10.22323/1.444.0600
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