MAGIC detection of GRB 201216C atz = 1.1
Authors: 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 , Bednarek W , Bernardini E , Bernete J , Berti A , Besenrieder J , Bigongiari C , Biland A , Blanch O , Bonnoli G , Bošnjak Ž , Burelli I , Busetto G , Campoy-Ordaz A , Carosi A , Carosi R , Carretero-Castrillo M , Castro-Tirado A J , Ceribella G , Chai Y , Cifuentes A , Cikota S , Colombo E , Contreras J L , Cortina J , Covino S , D’Amico G , D’Elia V , Da Vela P , Dazzi F , De Angelis A , De Lotto B , Del Popolo A , Delfino M , Delgado J , Mendez C Delgado , Depaoli D , Pierro F Di , Venere L Di , Prester D Dominis , Donini A , Dorner D , Doro M , Elsaesser D , Emery G , Escudero J , Fariña L , Fattorini A , Foffano L , Font L , Fukami S , Fukazawa Y , López R J García , Garczarczyk M , Gasparyan S , Gaug M , Paiva J G Giesbrecht , Giglietto N , Giordano F , Gliwny P , Godinović N , Grau R , Green D , Green J G , Hadasch D , Hahn A , Hassan T , Heckmann L , Herrera J , Hrupec D , Hütten M , Imazawa R , Inada T , Iotov R , Ishio K , Martínez I Jiménez , Jormanainen J , Kerszberg D , Kluge G W , Kobayashi Y , Kouch P M , Kubo H , Kushida J , Lezáun M Láinez , Lamastra A , Leone F , Lindfors E , Linhoff L , Lombardi S , Longo F , López-Coto R , López-Moya M , López-Oramas A , Loporchio S , Lorini A , Lyard E , de Oliveira Fraga B Machado , Majumdar P , Makariev M , Maneva G , Mang N , Manganaro M , Mangano S , Mannheim K , Mariotti M , Martínez M , Mas-Aguilar A , Mazin D , Menchiari S , Mender S , Mićanović S , Miceli D , Miener T , Miranda J M , Mirzoyan R , González M Molero , Molina E , Mondal H A , Moralejo A , Morcuende D , Nanci C , Nava L , Neustroev V , Rosillo M Nievas , Nigro C , Nikolić L , Nilsson K , Nishijima K , Ekoume T Njoh , Noda K , Nozaki S , Ohtani Y , Okumura A , Otero-Santos J , Paiano S , Palatiello M , Paneque D , Paoletti R , Paredes J M , Pavletić L , Pavlović D , Persic M , Pihet M , Pirola G , Podobnik F , Moroni P G Prada , Prandini E , Principe G , Priyadarshi C , Rhode W , Ribó M , Rico J , Righi C , Sahakyan N , Saito T , Satalecka K , Saturni F G , Schleicher B , Schmidt K , Schmuckermaier F , Schubert J L , Schweizer T , Sciaccaluga A , Sitarek J , Sliusar V , Sobczynska D , Spolon A , Stamerra A , Strišković J , Strom D , Strzys M , Suda Y , Suutarinen S , Tajima H , Takahashi M , Takeishi R , Tavecchio F , Temnikov P , Terauchi K , Terzić T , Teshima M , Tosti L , Truzzi S , Tutone A , Ubach S , van Scherpenberg J , Acosta M Vazquez , Ventura S , Verguilov V , Viale I , Vigorito C F , Vitale V , Vovk I , Walter R , Will M , Yamamoto T , Gomboc A , Jordana-Mitjans N , Melandri A , Mundell C G , Shrestha M , Steele I A 
Published: October 2023

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.