Identification of extreme energy photons with JEM-EUSO

Extensive searches for ultra-high-energy photons have been performed by past and current cosmic-ray observatories. Nevertheless, at present no firm candidates have been found. All candidate events are compatible with proton primaries, which are the principal source of backgrounds for their identific...

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Detalles Bibliográficos
Autores principales: Supanitsky, A.D., Medina-Tanco, G.
Formato: CONF
Materias:
JEM-EUSO
Ultra High Energy Photons
Cosmology
Observatories
Photons
Space stations
Telescopes
Fluorescence telescopes
Intergalactic medium
International Space stations
Japanese experimental modules
Primary particles
Space observatories
Ultra-high energies
Cosmic rays
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_97885890_v2013-October_n_p_Supanitsky
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_97885890_v2013-October_n_p_Supanitsky
record_format dspace
spelling todo:paper_97885890_v2013-October_n_p_Supanitsky2023-10-03T16:45:19Z Identification of extreme energy photons with JEM-EUSO Supanitsky, A.D. Medina-Tanco, G. JEM-EUSO Ultra High Energy Photons Cosmology Observatories Photons Space stations Telescopes Fluorescence telescopes Intergalactic medium International Space stations Japanese experimental modules JEM-EUSO Primary particles Space observatories Ultra-high energies Cosmic rays Extensive searches for ultra-high-energy photons have been performed by past and current cosmic-ray observatories. Nevertheless, at present no firm candidates have been found. All candidate events are compatible with proton primaries, which are the principal source of backgrounds for their identification. As a result, several upper limits on their integral photon flux have been obtained. Besides other theoretically possible sources, at least a flux of ultra-high-energy photons is expected as a result of the interactions suffered by cosmic rays during propagation through intergalactic medium. However, current upper limits do not reach the flux expected by the corresponding astrophysical models. Extreme Universe Space Observatory on board Japanese Experimental Module (JEM-EUSO), is an orbital fluorescence telescope intended to observe the most energetic component of cosmic rays (E ! 1019.7 eV), planned to be installed on the International Space Station. By design, the instrument is also sensitive to photons and neutrinos. In this work we study the potential of JEM-EUSO for photon searches. We obtain the upper limits on photon fractions in a total of expected events (under the assumption that there are no photons in the samples) for different combinations of observation time in the Nadir and Tilted modes of the telescope. For the calculation of the upper limits we use a statistical method based on the parameter Xmax, the atmospheric depth for which the maximum development of the shower of a primary particle is attained. © 2013 Sociedade Brasileira de Fisica. All Rights Reserved. CONF info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_97885890_v2013-October_n_p_Supanitsky
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic JEM-EUSO
Ultra High Energy Photons
Cosmology
Observatories
Photons
Space stations
Telescopes
Fluorescence telescopes
Intergalactic medium
International Space stations
Japanese experimental modules
JEM-EUSO
Primary particles
Space observatories
Ultra-high energies
Cosmic rays
spellingShingle JEM-EUSO
Ultra High Energy Photons
Cosmology
Observatories
Photons
Space stations
Telescopes
Fluorescence telescopes
Intergalactic medium
International Space stations
Japanese experimental modules
JEM-EUSO
Primary particles
Space observatories
Ultra-high energies
Cosmic rays
Supanitsky, A.D.
Medina-Tanco, G.
Identification of extreme energy photons with JEM-EUSO
topic_facet JEM-EUSO
Ultra High Energy Photons
Cosmology
Observatories
Photons
Space stations
Telescopes
Fluorescence telescopes
Intergalactic medium
International Space stations
Japanese experimental modules
JEM-EUSO
Primary particles
Space observatories
Ultra-high energies
Cosmic rays
description Extensive searches for ultra-high-energy photons have been performed by past and current cosmic-ray observatories. Nevertheless, at present no firm candidates have been found. All candidate events are compatible with proton primaries, which are the principal source of backgrounds for their identification. As a result, several upper limits on their integral photon flux have been obtained. Besides other theoretically possible sources, at least a flux of ultra-high-energy photons is expected as a result of the interactions suffered by cosmic rays during propagation through intergalactic medium. However, current upper limits do not reach the flux expected by the corresponding astrophysical models. Extreme Universe Space Observatory on board Japanese Experimental Module (JEM-EUSO), is an orbital fluorescence telescope intended to observe the most energetic component of cosmic rays (E ! 1019.7 eV), planned to be installed on the International Space Station. By design, the instrument is also sensitive to photons and neutrinos. In this work we study the potential of JEM-EUSO for photon searches. We obtain the upper limits on photon fractions in a total of expected events (under the assumption that there are no photons in the samples) for different combinations of observation time in the Nadir and Tilted modes of the telescope. For the calculation of the upper limits we use a statistical method based on the parameter Xmax, the atmospheric depth for which the maximum development of the shower of a primary particle is attained. © 2013 Sociedade Brasileira de Fisica. All Rights Reserved.
format CONF
author Supanitsky, A.D.
Medina-Tanco, G.
author_facet Supanitsky, A.D.
Medina-Tanco, G.
author_sort Supanitsky, A.D.
title Identification of extreme energy photons with JEM-EUSO
title_short Identification of extreme energy photons with JEM-EUSO
title_full Identification of extreme energy photons with JEM-EUSO
title_fullStr Identification of extreme energy photons with JEM-EUSO
title_full_unstemmed Identification of extreme energy photons with JEM-EUSO
title_sort identification of extreme energy photons with jem-euso
url http://hdl.handle.net/20.500.12110/paper_97885890_v2013-October_n_p_Supanitsky
work_keys_str_mv AT supanitskyad identificationofextremeenergyphotonswithjemeuso
AT medinatancog identificationofextremeenergyphotonswithjemeuso
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