A Targeted Search for Point Sources of EeV Neutrons

Detalhes bibliográficos
Autor(a) principal: Pierre Auger collaboration (496 authors)
Data de Publicação: 2014
Outros Autores: Abreu, Pedro, Andringa, Sofia, Assis, Pedro, Brogueira, Pedro, Cazon, Lorenzo, Conceição, Ruben, Diogo, Francisco, Espadanal, Joao, Gonçalves, Patrícia, Oliveira, Micael, Pimenta, Mário, Santo, Catarina E, Santos, Eva, Sarmento, Raul, Tomé, Bernardo
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.26/26613
Resumo: A flux of neutrons from an astrophysical source in the Galaxy can be detected in the Pierre Auger Observatory as an excess of cosmic-ray air showers arriving from the direction of the source. To avoid the statistical penalty for making many trials, classes of objects are tested in combinations as nine 'target sets,' in addition to the search for a neutron flux from the Galactic center or from the Galactic plane. Within a target set, each candidate source is weighted in proportion to its electromagnetic flux, its exposure to the Auger Observatory, and its flux attenuation factor due to neutron decay. These searches do not find evidence for a neutron flux from any class of candidate sources. Tabulated results give the combined p-value for each class, with and without the weights, and also the flux upper limit for the most significant candidate source within each class. These limits on fluxes of neutrons significantly constrain models of EeV proton emission from non-transient discrete sources in the Galaxy.
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spelling A Targeted Search for Point Sources of EeV NeutronsA flux of neutrons from an astrophysical source in the Galaxy can be detected in the Pierre Auger Observatory as an excess of cosmic-ray air showers arriving from the direction of the source. To avoid the statistical penalty for making many trials, classes of objects are tested in combinations as nine 'target sets,' in addition to the search for a neutron flux from the Galactic center or from the Galactic plane. Within a target set, each candidate source is weighted in proportion to its electromagnetic flux, its exposure to the Auger Observatory, and its flux attenuation factor due to neutron decay. These searches do not find evidence for a neutron flux from any class of candidate sources. Tabulated results give the combined p-value for each class, with and without the weights, and also the flux upper limit for the most significant candidate source within each class. These limits on fluxes of neutrons significantly constrain models of EeV proton emission from non-transient discrete sources in the Galaxy.Repositório ComumPierre Auger collaboration (496 authors)Abreu, PedroAndringa, SofiaAssis, PedroBrogueira, PedroCazon, LorenzoConceição, RubenDiogo, FranciscoEspadanal, JoaoGonçalves, PatríciaOliveira, MicaelPimenta, MárioSanto, Catarina ESantos, EvaSarmento, RaulTomé, Bernardo2019-02-04T03:45:08Z2014-06-252019-02-04T03:45:08Z2014-06-25T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.26/26613enghttp://dx.doi.org/10.1088/2041-8205/789/2/L34info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-05-16T07:27:54Zoai:comum.rcaap.pt:10400.26/26613Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-05-16T07:27:54Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv A Targeted Search for Point Sources of EeV Neutrons
title A Targeted Search for Point Sources of EeV Neutrons
spellingShingle A Targeted Search for Point Sources of EeV Neutrons
Pierre Auger collaboration (496 authors)
title_short A Targeted Search for Point Sources of EeV Neutrons
title_full A Targeted Search for Point Sources of EeV Neutrons
title_fullStr A Targeted Search for Point Sources of EeV Neutrons
title_full_unstemmed A Targeted Search for Point Sources of EeV Neutrons
title_sort A Targeted Search for Point Sources of EeV Neutrons
author Pierre Auger collaboration (496 authors)
author_facet Pierre Auger collaboration (496 authors)
Abreu, Pedro
Andringa, Sofia
Assis, Pedro
Brogueira, Pedro
Cazon, Lorenzo
Conceição, Ruben
Diogo, Francisco
Espadanal, Joao
Gonçalves, Patrícia
Oliveira, Micael
Pimenta, Mário
Santo, Catarina E
Santos, Eva
Sarmento, Raul
Tomé, Bernardo
author_role author
author2 Abreu, Pedro
Andringa, Sofia
Assis, Pedro
Brogueira, Pedro
Cazon, Lorenzo
Conceição, Ruben
Diogo, Francisco
Espadanal, Joao
Gonçalves, Patrícia
Oliveira, Micael
Pimenta, Mário
Santo, Catarina E
Santos, Eva
Sarmento, Raul
Tomé, Bernardo
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Repositório Comum
dc.contributor.author.fl_str_mv Pierre Auger collaboration (496 authors)
Abreu, Pedro
Andringa, Sofia
Assis, Pedro
Brogueira, Pedro
Cazon, Lorenzo
Conceição, Ruben
Diogo, Francisco
Espadanal, Joao
Gonçalves, Patrícia
Oliveira, Micael
Pimenta, Mário
Santo, Catarina E
Santos, Eva
Sarmento, Raul
Tomé, Bernardo
description A flux of neutrons from an astrophysical source in the Galaxy can be detected in the Pierre Auger Observatory as an excess of cosmic-ray air showers arriving from the direction of the source. To avoid the statistical penalty for making many trials, classes of objects are tested in combinations as nine 'target sets,' in addition to the search for a neutron flux from the Galactic center or from the Galactic plane. Within a target set, each candidate source is weighted in proportion to its electromagnetic flux, its exposure to the Auger Observatory, and its flux attenuation factor due to neutron decay. These searches do not find evidence for a neutron flux from any class of candidate sources. Tabulated results give the combined p-value for each class, with and without the weights, and also the flux upper limit for the most significant candidate source within each class. These limits on fluxes of neutrons significantly constrain models of EeV proton emission from non-transient discrete sources in the Galaxy.
publishDate 2014
dc.date.none.fl_str_mv 2014-06-25
2014-06-25T00:00:00Z
2019-02-04T03:45:08Z
2019-02-04T03:45:08Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.26/26613
url http://hdl.handle.net/10400.26/26613
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://dx.doi.org/10.1088/2041-8205/789/2/L34
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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repository.mail.fl_str_mv mluisa.alvim@gmail.com
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