Multiwavelength study of GRB 201216C using the sub-TeV emission detected by MAGIC - INSPIRE

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Multiwavelength study of GRB 201216C using the sub-TeV emission detected by MAGIC

MAGIC

Collaboration

•

Hyuga Abe

Jul 25, 2023

10 pages

Published in:

PoS ICRC2023 (2023) 791

Contribution to:

- ICRC2023
, 791

Published: Jul 25, 2023

DOI:

10.22323/1.444.0791

Experiments:

MAGIC

reference search1 citation

Citations per year

Abstract: (SISSA)

Recently, several gamma-ray bursts (GRBs) have been detected in the very-high-energy (VHE) gamma-ray energy range by ground-based gamma-ray experiments such as MAGIC, H.E.S.S., and LHASSO. For some GRBs, the VHE emission is consistent with synchrotron self-Compton (SSC) emission from high-energy electrons accelerated in the forward shock of the relativistic jet. However, more statistics are needed to further constrain the emission models. GRB 201216C is a long bright GRB detected in a broad energy range from radio to VHE. The redshift is estimated to be 1.1, making the GRB the most distant source detected in the VHE energy range. MAGIC started the observation 56 seconds after the GRB was triggered by the Swift-BAT telescope. We performed a detailed analysis and detected the signal with about 6 sigma in the first 20 minutes. MAGIC continued the observation for 2.2 hours on the same night and 4 hours on the next night. No signal was detected later than 40 minutes after the GRB trigger. We have performed modelling of the multi-wavelength emission using the MAGIC data. We analysed simultaneous optical data from Liverpool Telescope with MAGIC and included the results in the modelling. The sub-TeV emission is consistent with the single-zone SSC model in the forward shock. In this presentation, we show the final results of the MAGIC data analysis of GRB 201216C and discuss the emission mechanism of the multi-wavelength data.

gamma ray: burst
jet: relativistic
gamma ray: energy
emission: model
MAGIC
gamma ray: VHE
synchrotron
statistics
radio wave
redshift

References(38)

Figures(0)

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