MAGIC Observations of the Nearby Short Gamma-Ray Burst GRB 160821B

The coincident detection of GW170817 in gravitational waves and electromagnetic radiation spanning the radio to MeV gamma-ray bands provided the first direct evidence that short gamma-ray bursts (GRBs) can originate from binary neutron star (BNS) mergers. On the other hand, the properties of short G...

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Autores: Baquero Larriva, Orlando Andrés, Barrio Uña, Juan Abel, Contreras González, José Luis, Fonseca González, María Victoria, Hoang, Kim Dinh, López Moya, Marcos, Miener, Tjark, Morcuende, D., Peñil Del Campo, Pablo, Saha, Lab
Tipo de recurso: artículo
Fecha de publicación:2021
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/8297
Acceso en línea:https://hdl.handle.net/20.500.14352/8297
Access Level:acceso abierto
Palabra clave:539.1
Gamma-ray bursts
Física nuclear
2207 Física Atómica y Nuclear
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oai_identifier_str oai:docta.ucm.es:20.500.14352/8297
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spelling MAGIC Observations of the Nearby Short Gamma-Ray Burst GRB 160821BBaquero Larriva, Orlando AndrésBarrio Uña, Juan AbelContreras González, José LuisFonseca González, María VictoriaHoang, Kim DinhLópez Moya, MarcosMiener, TjarkMorcuende, D.Peñil Del Campo, PabloSaha, Lab539.1Gamma-ray burstsFísica nuclear2207 Física Atómica y NuclearThe coincident detection of GW170817 in gravitational waves and electromagnetic radiation spanning the radio to MeV gamma-ray bands provided the first direct evidence that short gamma-ray bursts (GRBs) can originate from binary neutron star (BNS) mergers. On the other hand, the properties of short GRBs in high-energy gamma-rays are still poorly constrained, with only similar to 20 events detected in the GeV band, and none in the TeV band. GRB 160821B is one of the nearest short GRBs known at z = 0.162. Recent analyses of the multiwavelength observational data of its afterglow emission revealed an optical-infrared kilonova component, characteristic of heavy-element nucleosynthesis in a BNS merger. Aiming to better clarify the nature of short GRBs, this burst was automatically followed up with the MAGIC telescopes, starting from 24 s after the burst trigger. Evidence of a gamma-ray signal is found above similar to 0.5 TeV at a significance of similar to 3 sigma during observations that lasted until 4 hr after the burst. Assuming that the observed excess events correspond to gamma-ray emission from GRB 160821B, in conjunction with data at other wavelengths, we investigate its origin in the framework of GRB afterglow models. The simplest interpretation with one-zone models of synchrotron-self-Compton emission from the external forward shock has difficulty accounting for the putative TeV flux. Alternative scenarios are discussed where the TeV emission can be relatively enhanced. The role of future GeV-TeV observations of short GRBs in advancing our understanding of BNS mergers and related topics is briefly addressed.IOP PublishingUniversidad Complutense de Madrid20212021-02-0120212021-02-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/8297reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/82972026-06-02T12:44:21Z
dc.title.none.fl_str_mv MAGIC Observations of the Nearby Short Gamma-Ray Burst GRB 160821B
title MAGIC Observations of the Nearby Short Gamma-Ray Burst GRB 160821B
spellingShingle MAGIC Observations of the Nearby Short Gamma-Ray Burst GRB 160821B
Baquero Larriva, Orlando Andrés
539.1
Gamma-ray bursts
Física nuclear
2207 Física Atómica y Nuclear
title_short MAGIC Observations of the Nearby Short Gamma-Ray Burst GRB 160821B
title_full MAGIC Observations of the Nearby Short Gamma-Ray Burst GRB 160821B
title_fullStr MAGIC Observations of the Nearby Short Gamma-Ray Burst GRB 160821B
title_full_unstemmed MAGIC Observations of the Nearby Short Gamma-Ray Burst GRB 160821B
title_sort MAGIC Observations of the Nearby Short Gamma-Ray Burst GRB 160821B
dc.creator.none.fl_str_mv Baquero Larriva, Orlando Andrés
Barrio Uña, Juan Abel
Contreras González, José Luis
Fonseca González, María Victoria
Hoang, Kim Dinh
López Moya, Marcos
Miener, Tjark
Morcuende, D.
Peñil Del Campo, Pablo
Saha, Lab
author Baquero Larriva, Orlando Andrés
author_facet Baquero Larriva, Orlando Andrés
Barrio Uña, Juan Abel
Contreras González, José Luis
Fonseca González, María Victoria
Hoang, Kim Dinh
López Moya, Marcos
Miener, Tjark
Morcuende, D.
Peñil Del Campo, Pablo
Saha, Lab
author_role author
author2 Barrio Uña, Juan Abel
Contreras González, José Luis
Fonseca González, María Victoria
Hoang, Kim Dinh
López Moya, Marcos
Miener, Tjark
Morcuende, D.
Peñil Del Campo, Pablo
Saha, Lab
author2_role author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 539.1
Gamma-ray bursts
Física nuclear
2207 Física Atómica y Nuclear
topic 539.1
Gamma-ray bursts
Física nuclear
2207 Física Atómica y Nuclear
description The coincident detection of GW170817 in gravitational waves and electromagnetic radiation spanning the radio to MeV gamma-ray bands provided the first direct evidence that short gamma-ray bursts (GRBs) can originate from binary neutron star (BNS) mergers. On the other hand, the properties of short GRBs in high-energy gamma-rays are still poorly constrained, with only similar to 20 events detected in the GeV band, and none in the TeV band. GRB 160821B is one of the nearest short GRBs known at z = 0.162. Recent analyses of the multiwavelength observational data of its afterglow emission revealed an optical-infrared kilonova component, characteristic of heavy-element nucleosynthesis in a BNS merger. Aiming to better clarify the nature of short GRBs, this burst was automatically followed up with the MAGIC telescopes, starting from 24 s after the burst trigger. Evidence of a gamma-ray signal is found above similar to 0.5 TeV at a significance of similar to 3 sigma during observations that lasted until 4 hr after the burst. Assuming that the observed excess events correspond to gamma-ray emission from GRB 160821B, in conjunction with data at other wavelengths, we investigate its origin in the framework of GRB afterglow models. The simplest interpretation with one-zone models of synchrotron-self-Compton emission from the external forward shock has difficulty accounting for the putative TeV flux. Alternative scenarios are discussed where the TeV emission can be relatively enhanced. The role of future GeV-TeV observations of short GRBs in advancing our understanding of BNS mergers and related topics is briefly addressed.
publishDate 2021
dc.date.none.fl_str_mv 2021
2021-02-01
2021
2021-02-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/8297
url https://hdl.handle.net/20.500.14352/8297
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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