MAGIC 对邻近短伽马射线暴 GRB 160821B 的观测
高能天体物理现象
2021-02-18 v1
摘要
GW170817 在引力波与从射电到 MeV 伽马射线波段电磁辐射中的巧合探测，提供了短伽马射线暴（GRB）可起源于双中子星（BNS）并合的首个直接证据。另一方面，短 GRB 在高能伽马射线中的性质仍约束甚少，仅有 20 个事件在 GeV 波段被探测到，而在 TeV 波段为零。GRB~160821B 是已知最近的短 GRB 之一，红移 。对其余辉发射的多波段观测数据的最新分析揭示了一个光学-红外千新星成分，这是 BNS 并合中重元素核合成的特征。为更好阐明短 GRB 的本质，该暴在触发后 24 秒起由 MAGIC 望远镜自动跟进观测。在持续至暴后 4 小时的观测中，在 0.5 TeV 以上发现显著性约 的伽马射线信号证据。假设观测到的超出事件对应于 GRB 160821B 的伽马射线发射，结合其他波段数据，我们在 GRB 余辉模型框架下探究其起源。来自外正向激波的合成自康普顿发射的单区模型这一最简解释难以解释假定的 TeV 流量。我们讨论了 TeV 发射可相对增强的替代情形。简要探讨了未来短 GRB 的 GeV-TeV 观测在推进我们对 BNS 并合及相关课题理解中的作用。
引用
@article{arxiv.2012.07193,
title = {MAGIC observations of the nearby short gamma-ray burst GRB 160821B},
author = {MAGIC Collaboration and V. A. Acciari and S. Ansoldi and L. A. Antonelli and A. Arbet Engels and K. Asano and D. Baack and A. Babić and A. Baquero and U. Barres de Almeida and J. A. Barrio and J. Becerra González and W. Bednarek and L. Bellizzi and E. Bernardini and M. Bernardos and A. Berti and J. Besenrieder and W. Bhattacharyya and C. Bigongiari and A. Biland and O. Blanch and G. Bonnoli and Ž. Bošnjak and G. Busetto and R. Carosi and G. Ceribella and M. Cerruti and Y. Chai and A. Chilingarian and S. Cikota and S. M. Colak and E. Colombo and J. L. Contreras and J. Cortina and S. Covino and G. D'Amico and V. D'Elia and P. Da Vela and F. Dazzi and A. De Angelis and B. De Lotto and M. Delfino and J. Delgado and C. Delgado Mendez and D. Depaoli and F. Di Pierro and L. Di Venere and E. Do Souto Espiñeira and D. Dominis Prester and A. Donini and D. Dorner and M. Doro and D. Elsaesser and V. Fallah Ramazani and A. Fattorini and G. Ferrara and L. Foffano and M. V. Fonseca and L. Font and C. Fruck and S. Fukami and R. J. García López and M. Garczarczyk and S. Gasparyan and M. Gaug and N. Giglietto and F. Giordano and P. Gliwny and N. Godinović and J. G. Green and D. Green and D. Hadasch and A. Hahn and L. Heckmann and J. Herrera and J. Hoang and D. Hrupec and M. Hütten and T. Inada and S. Inoue and K. Ishio and Y. Iwamura and J. Jormanainen and L. Jouvin and Y. Kajiwara and M. Karjalainen and D. Kerszberg and Y. Kobayashi and H. Kubo and J. Kushida and A. Lamastra and D. Lelas and F. Leone and E. Lindfors and S. Lombardi and F. Longo and R. López-Coto and M. López-Moya and A. López-Oramas and S. Loporchio and B. Machado de Oliveira Fraga and C. Maggio and P. Majumdar and M. Makariev and M. Mallamaci and G. Maneva and M. Manganaro and K. Mannheim and L. Maraschi and M. Mariotti and M. Martínez and D. Mazin and S. Mender and S. Mićanović and D. Miceli and T. Miener and M. Minev and J. M. Miranda and R. Mirzoyan and E. Molina and A. Moralejo and D. Morcuende and V. Moreno and E. Moretti and V. Neustroev and C. Nigro and K. Nilsson and D. Ninci and K. Nishijima and K. Noda and S. Nozaki and Y. Ohtani and T. Oka and J. Otero-Santos and S. Paiano and M. Palatiello and D. Paneque and R. Paoletti and J. M. Paredes and L. Pavletić and P. Peñil and C. Perennes and M. Persic and P. G. Prada Moroni and E. Prandini and C. Priyadarshi and I. Puljak and W. Rhode and M. Ribó and J. Rico and C. Righi and A. Rugliancich and L. Saha and N. Sahakyan and T. Saito and S. Sakurai and K. Satalecka and F. G. Saturni and B. Schleicher and K. Schmidt and T. Schweizer and J. Sitarek and I. Šnidarić and D. Sobczynska and A. Spolon and A. Stamerra and D. Strom and M. Strzys and Y. Suda and T. Surić and M. Takahashi and F. Tavecchio and P. Temnikov and T. Terzić and M. Teshima and N. Torres-Albà and L. Tosti and S. Truzzi and A. Tutone and J. van Scherpenberg and G. Vanzo and M. Vazquez Acosta and S. Ventura and V. Verguilov and C. F. Vigorito and V. Vitale and I. Vovk and M. Will and D. Zarić and L. Nava},
journal= {arXiv preprint arXiv:2012.07193},
year = {2021}
}
备注
13 pages, 4 figures, Accepted for publication in ApJ. Corresponding authors: K. Noda, L. Nava, and S. Inoue