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

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 \SI{70}{\GeV} of GRB~201216C is modelled together with multi-wavelength data within a synchrotron and synchrotron-self Compton (SSC) scenario. We find that SSC can explain the broadband 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 favors 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.

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

References in corpus (18)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• The Supernova -- Gamma-Ray Burst Connection
• An Ordinary Short Gamma-Ray Burst with Extraordinary Implications: Fermi-GBM Detection of GRB 170817A
• The Physics of Gamma-Ray Bursts and Relativistic Jets
• The major upgrade of the MAGIC telescopes, Part II: A performance study using observations of the Crab Nebula
• Teraelectronvolt emission from the $\gamma$-ray burst GRB 190114C
• A very-high-energy component deep in the Gamma-ray Burst afterglow
• Observation of inverse Compton emission from a long $\gamma$-ray burst
• A tera-electronvolt afterglow from a narrow jet in an extremely bright gamma-ray burst 221009A
• Revealing x-ray and gamma ray temporal and spectral similarities in the GRB 190829A afterglow
• Unfolding of differential energy spectra in the MAGIC experiment
• Detection of Low-energy Breaks in Gamma-Ray Burst Prompt Emission Spectra
• MAGIC observations of the nearby short gamma-ray burst GRB 160821B
• Gamma-ray bursts afterglow physics and the VHE domain
• Detection of the Geminga pulsar with MAGIC hints at a power-law tail emission beyond 15 GeV
• Characterizing the aerosol atmosphere above the Observatorio del Roque de los Muchachos by analyzing seven years of data taken with an GaAsP HPD-readout, absolutely calibrated elastic LIDAR
• Correcting Imaging Atmospheric Cherenkov Telescope data with atmospheric profiles obtained with an elastic light detecting and ranging system
• Simulations of gamma-ray burst afterglows with a relativistic kinetic code

Cited by in corpus (12)

• Camelidae on BOAT: observation of a second spectral component in GRB 221009A
• GRB 221009A: Observations with LST-1 of CTAO and Implications for Structured Jets in Long Gamma-Ray Bursts
• TeV Afterglows of Gamma-Ray Bursts: Theoretical Analysis and Prospects for Future Observations
• Modelling multiwavelength afterglows of the VHE-GRB population
• Two-component jet model for the afterglow emission of GRB 201216C and GRB 221009A and implications for jet structure of very-high-energy gamma-ray bursts
• Follow-up of Neutron Star Mergers with CTA and Prospects for Joint Detection with Gravitational-Wave Detectors
• New Insights on Gamma-Ray Burst Radiation Mechanisms from Multiwavelength Observations
• Testing the ubiquitous presence of very high energy emission in gamma-ray bursts with the MAGIC telescopes
• Broadband Modelling of GRB 230812B Afterglow: Implications for VHE $\gamma$-ray Detection with IACTs
• Chasing Gamma-Ray Signals from Binary Neutron Star Coalescences with the Cherenkov Telescope Array: Prospects and Observing Strategies
• The second H.E.S.S. gamma-ray burst catalogue: 15 years of observations with the H.E.S.S. telescopes
• The impact of kilonova seed photons on GRB VHE emission