Extreme high energy proton-gamma discrimination from space observations

Autores
Supanitsky, Alberto Daniel; Medina Tanco, Gustavo Adolfo
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The origin of the highest energy cosmic rays is still unknown. At present, the major uncertainties are located at energies above ~10^19.5 eV, the expected beginning of the GZK suppression. This is mainly due to the low statistics available, a problem that will be addressed in unprecedented way by the upcoming orbital detectors like JEM-EUSO. The detection of very high energy photons is of great relevance for the understanding of the origin of this extreme energy cosmic rays (EECR), due to the astrophysical information content. However, their discrimination is an experimental challenge for current and future cosmic ray detectors. In this work we study the statistical separation between hadron and photon showers from space observations at energies where both, the Landau–Pomeranchuk–Migdal (LPM) effect and magnetospheric interactions are important for the development of the cascades. We base our analysis on the Xmax parameter, which is already a well known composition discrimination parameter for ground based fluorescence observatories. Our analysis applies to orbiting detectors in general. Nevertheless, we exemplify the practical utilization of our technique by estimating a general upper limit to the photon fraction in the integral flux, attainable by an ideal orbital detector with characteristics similar to JEM-EUSO. In the process we describe the resultant asymmetry in the photon–hadron discrimination efficiency in galactic coordinates.
Fil: Supanitsky, Alberto Daniel. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina. Universidad Nacional Autónoma de México; México
Fil: Medina Tanco, Gustavo Adolfo. Universidad Nacional Autónoma de México; México
Materia
COSMIC RAYS
GAMMA DISCRIMINATION
SPACE OBSERVATION
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/19820
Acceder
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spelling Extreme high energy proton-gamma discrimination from space observationsSupanitsky, Alberto DanielMedina Tanco, Gustavo AdolfoCOSMIC RAYSGAMMA DISCRIMINATIONSPACE OBSERVATIONhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The origin of the highest energy cosmic rays is still unknown. At present, the major uncertainties are located at energies above ~10^19.5 eV, the expected beginning of the GZK suppression. This is mainly due to the low statistics available, a problem that will be addressed in unprecedented way by the upcoming orbital detectors like JEM-EUSO. The detection of very high energy photons is of great relevance for the understanding of the origin of this extreme energy cosmic rays (EECR), due to the astrophysical information content. However, their discrimination is an experimental challenge for current and future cosmic ray detectors. In this work we study the statistical separation between hadron and photon showers from space observations at energies where both, the Landau–Pomeranchuk–Migdal (LPM) effect and magnetospheric interactions are important for the development of the cascades. We base our analysis on the Xmax parameter, which is already a well known composition discrimination parameter for ground based fluorescence observatories. Our analysis applies to orbiting detectors in general. Nevertheless, we exemplify the practical utilization of our technique by estimating a general upper limit to the photon fraction in the integral flux, attainable by an ideal orbital detector with characteristics similar to JEM-EUSO. In the process we describe the resultant asymmetry in the photon–hadron discrimination efficiency in galactic coordinates.Fil: Supanitsky, Alberto Daniel. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina. Universidad Nacional Autónoma de México; MéxicoFil: Medina Tanco, Gustavo Adolfo. Universidad Nacional Autónoma de México; MéxicoElsevier Science2011-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/19820Supanitsky, Alberto Daniel; Medina Tanco, Gustavo Adolfo; Extreme high energy proton-gamma discrimination from space observations; Elsevier Science; Astroparticle Physics; 34; 3-2011; 789-7950927-6505CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.astropartphys.2011.02.003info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1102.2752info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0927650511000387info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:46:31Zoai:ri.conicet.gov.ar:11336/19820instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:46:31.668CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Extreme high energy proton-gamma discrimination from space observations
title Extreme high energy proton-gamma discrimination from space observations
spellingShingle Extreme high energy proton-gamma discrimination from space observations
Supanitsky, Alberto Daniel
COSMIC RAYS
GAMMA DISCRIMINATION
SPACE OBSERVATION
title_short Extreme high energy proton-gamma discrimination from space observations
title_full Extreme high energy proton-gamma discrimination from space observations
title_fullStr Extreme high energy proton-gamma discrimination from space observations
title_full_unstemmed Extreme high energy proton-gamma discrimination from space observations
title_sort Extreme high energy proton-gamma discrimination from space observations
dc.creator.none.fl_str_mv Supanitsky, Alberto Daniel
Medina Tanco, Gustavo Adolfo
author Supanitsky, Alberto Daniel
author_facet Supanitsky, Alberto Daniel
Medina Tanco, Gustavo Adolfo
author_role author
author2 Medina Tanco, Gustavo Adolfo
author2_role author
dc.subject.none.fl_str_mv COSMIC RAYS
GAMMA DISCRIMINATION
SPACE OBSERVATION
topic COSMIC RAYS
GAMMA DISCRIMINATION
SPACE OBSERVATION
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The origin of the highest energy cosmic rays is still unknown. At present, the major uncertainties are located at energies above ~10^19.5 eV, the expected beginning of the GZK suppression. This is mainly due to the low statistics available, a problem that will be addressed in unprecedented way by the upcoming orbital detectors like JEM-EUSO. The detection of very high energy photons is of great relevance for the understanding of the origin of this extreme energy cosmic rays (EECR), due to the astrophysical information content. However, their discrimination is an experimental challenge for current and future cosmic ray detectors. In this work we study the statistical separation between hadron and photon showers from space observations at energies where both, the Landau–Pomeranchuk–Migdal (LPM) effect and magnetospheric interactions are important for the development of the cascades. We base our analysis on the Xmax parameter, which is already a well known composition discrimination parameter for ground based fluorescence observatories. Our analysis applies to orbiting detectors in general. Nevertheless, we exemplify the practical utilization of our technique by estimating a general upper limit to the photon fraction in the integral flux, attainable by an ideal orbital detector with characteristics similar to JEM-EUSO. In the process we describe the resultant asymmetry in the photon–hadron discrimination efficiency in galactic coordinates.
Fil: Supanitsky, Alberto Daniel. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina. Universidad Nacional Autónoma de México; México
Fil: Medina Tanco, Gustavo Adolfo. Universidad Nacional Autónoma de México; México
description The origin of the highest energy cosmic rays is still unknown. At present, the major uncertainties are located at energies above ~10^19.5 eV, the expected beginning of the GZK suppression. This is mainly due to the low statistics available, a problem that will be addressed in unprecedented way by the upcoming orbital detectors like JEM-EUSO. The detection of very high energy photons is of great relevance for the understanding of the origin of this extreme energy cosmic rays (EECR), due to the astrophysical information content. However, their discrimination is an experimental challenge for current and future cosmic ray detectors. In this work we study the statistical separation between hadron and photon showers from space observations at energies where both, the Landau–Pomeranchuk–Migdal (LPM) effect and magnetospheric interactions are important for the development of the cascades. We base our analysis on the Xmax parameter, which is already a well known composition discrimination parameter for ground based fluorescence observatories. Our analysis applies to orbiting detectors in general. Nevertheless, we exemplify the practical utilization of our technique by estimating a general upper limit to the photon fraction in the integral flux, attainable by an ideal orbital detector with characteristics similar to JEM-EUSO. In the process we describe the resultant asymmetry in the photon–hadron discrimination efficiency in galactic coordinates.
publishDate 2011
dc.date.none.fl_str_mv 2011-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/19820
Supanitsky, Alberto Daniel; Medina Tanco, Gustavo Adolfo; Extreme high energy proton-gamma discrimination from space observations; Elsevier Science; Astroparticle Physics; 34; 3-2011; 789-795
0927-6505
CONICET Digital
CONICET
url http://hdl.handle.net/11336/19820
identifier_str_mv Supanitsky, Alberto Daniel; Medina Tanco, Gustavo Adolfo; Extreme high energy proton-gamma discrimination from space observations; Elsevier Science; Astroparticle Physics; 34; 3-2011; 789-795
0927-6505
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.astropartphys.2011.02.003
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1102.2752
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0927650511000387
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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