1. MAGIC detection of GRB 201216C at z = 1.1.
- Author
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Abe, H, Abe, S, Acciari, V A, Agudo, I, Aniello, T, Ansoldi, S, Antonelli, L A, Engels, A Arbet, Arcaro, C, Artero, M, Asano, K, Baack, D, Babić, A, Baquero, A, de Almeida, U Barres, Barrio, J A, Batković, I, Baxter, J, González, J Becerra, and Bednarek, W
- Subjects
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ELECTROMAGNETIC radiation , *ELECTROMAGNETIC waves , *GAMMA ray bursts , *COSMOLOGICAL distances , *ENERGY bands , *MAGIC - 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. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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