A search for point sources of EeV photons

Measurements of air showers made using the hybrid technique developed with the fluorescence and surface detectors of the Pierre Auger Observatory allow a sensitive search for point sources of EeV photons anywhere in the exposed sky. A multivariate analysis reduces the background of hadronic cosmic r...

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Autor principal: Multitudinario:485
Formato: JOUR
Materias:
astroparticle physics
cosmic rays
methods: data analysis
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0004637X_v789_n2_p_Multitudinario
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_0004637X_v789_n2_p_Multitudinario2023-10-03T14:02:35Z A search for point sources of EeV photons Multitudinario:485 astroparticle physics cosmic rays methods: data analysis Measurements of air showers made using the hybrid technique developed with the fluorescence and surface detectors of the Pierre Auger Observatory allow a sensitive search for point sources of EeV photons anywhere in the exposed sky. A multivariate analysis reduces the background of hadronic cosmic rays. The search is sensitive to a declination band from -85° to +20°, in an energy range from 10 17.3 eV to 10 18.5 eV. No photon point source has been detected. An upper limit on the photon flux has been derived for every direction. The mean value of the energy flux limit that results from this, assuming a photon spectral index of -2, is 0.06 eV cm -2 s -1 , and no celestial direction exceeds 0.25 eV cm -2 s -1 . These upper limits constrain scenarios in which EeV cosmic ray protons are emitted by non-transient sources in the Galaxy. © 2014. The American Astronomical Society. All rights reserved.. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0004637X_v789_n2_p_Multitudinario
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic astroparticle physics
cosmic rays
methods: data analysis
spellingShingle astroparticle physics
cosmic rays
methods: data analysis
Multitudinario:485
A search for point sources of EeV photons
topic_facet astroparticle physics
cosmic rays
methods: data analysis
description Measurements of air showers made using the hybrid technique developed with the fluorescence and surface detectors of the Pierre Auger Observatory allow a sensitive search for point sources of EeV photons anywhere in the exposed sky. A multivariate analysis reduces the background of hadronic cosmic rays. The search is sensitive to a declination band from -85° to +20°, in an energy range from 10 17.3 eV to 10 18.5 eV. No photon point source has been detected. An upper limit on the photon flux has been derived for every direction. The mean value of the energy flux limit that results from this, assuming a photon spectral index of -2, is 0.06 eV cm -2 s -1 , and no celestial direction exceeds 0.25 eV cm -2 s -1 . These upper limits constrain scenarios in which EeV cosmic ray protons are emitted by non-transient sources in the Galaxy. © 2014. The American Astronomical Society. All rights reserved..
format JOUR
author Multitudinario:485
author_facet Multitudinario:485
author_sort Multitudinario:485
title A search for point sources of EeV photons
title_short A search for point sources of EeV photons
title_full A search for point sources of EeV photons
title_fullStr A search for point sources of EeV photons
title_full_unstemmed A search for point sources of EeV photons
title_sort search for point sources of eev photons
url http://hdl.handle.net/20.500.12110/paper_0004637X_v789_n2_p_Multitudinario
work_keys_str_mv AT multitudinario485 asearchforpointsourcesofeevphotons
AT multitudinario485 searchforpointsourcesofeevphotons
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