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.

MAGIC detection of GRB 201216C at z = 1.1

Depaoli D.;Vigorito C. F.;
2024-01-01

Abstract

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.
2024
Inglese
Esperti anonimi
527
3
5856
5867
12
https://academic.oup.com/mnras/article/527/3/5856/7326795
astroparticle physics; gamma-ray burst: individual: GRB 201216C; gamma-ray bursts; radiation mechanisms: non-thermal
GERMANIA
SPAGNA
ARMENIA
BRASILE
GIAPPONE
POLONIA
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Abe H.; Abe S.; Acciari V.A.; Agudo I.; Aniello T.; Ansoldi S.; Antonelli L.A.; Arbet Engels A.; Arcaro C.; Artero M.; Asano K.; Baack D.; Babic A.; B...espandi
info:eu-repo/semantics/article
open
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1998890
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