MAGIC detection of GRB 201216C at $z$ = 1.1 - INSPIRE

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MAGIC detection of GRB 201216C at $z$ = 1.1

Oct 10, 2023

13 pages

Published in:

Mon.Not.Roy.Astron.Soc. 527 (2023) 3, 5856-5867

Published: Nov 27, 2023

e-Print:

2310.06473 [astro-ph.HE]

DOI:

10.1093/mnras/stad2958

View in:

ADS Abstract Service

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Abstract: (Oxford University Press)

Gamma-ray bursts (GRBs) are explosive transient events occurring at cosmological distances, releasing a large amount of energy as electromagnetic radiation over several energy bands. We report the detection of the long GRB 201216C by the MAGIC telescopes. The source is located at z = 1.1 and thus it is the farthest one detected at very high energies. The emission above 70 GeV of GRB 201216C is modelled together with multiwavelength data within a synchrotron and synchrotron self-Compton (SSC) scenario. We find that SSC can explain the broad-band data well from the optical to the very-high-energy band. For the late-time radio data, a different component is needed to account for the observed emission. Differently from previous GRBs detected in the very-high-energy range, the model for GRB 201216C strongly favours a wind-like medium. The model parameters have values similar to those found in past studies of the afterglows of GRBs detected up to GeV energies.

Note:

13 pages, 6 figures, 2 tables. Accepted for publication in Monthly Notices of the Royal Astronomical Society

astroparticle physics
radiation mechanisms: non-thermal
gamma-ray burst: individual: GRB 201216C
gamma-ray bursts
gamma ray: burst
radiation: electromagnetic
VHE
MAGIC
redshift
gamma ray: emission

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