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Title: Upper limit on the primary photon fraction from the Pierre Auger Observatory

Abstract

Based on observations of the depth of shower maximum performed with the hybrid detector of the Auger Observatory, an upper limit on the cosmic-ray photon fraction of 26% (at 95% confidence level) is derived for primary energies above 10{sup 19} eV. Additional observables recorded with the surface detector array, available for a sub-set of the data sample, support the conclusion that a photon origin of the observed events is not favoured.

Authors:
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
15020266
Report Number(s):
FERMILAB-CONF-05-274-E-TD
arXiv eprint number astro-ph/0507402; TRN: US0605079
DOE Contract Number:  
AC02-76CH03000
Resource Type:
Conference
Resource Relation:
Conference: Presented at 29th International Cosmic Ray Conference (ICRC 2005), Pune, India, 3-11 Aug 2005
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ORIGIN; PHOTONS; ASTROPHYSICS; Astrophysics

Citation Formats

Risse, Markus, and /Karlsruhe, Forschungszentrum. Upper limit on the primary photon fraction from the Pierre Auger Observatory. United States: N. p., 2005. Web.
Risse, Markus, & /Karlsruhe, Forschungszentrum. Upper limit on the primary photon fraction from the Pierre Auger Observatory. United States.
Risse, Markus, and /Karlsruhe, Forschungszentrum. Fri . "Upper limit on the primary photon fraction from the Pierre Auger Observatory". United States. https://www.osti.gov/servlets/purl/15020266.
@article{osti_15020266,
title = {Upper limit on the primary photon fraction from the Pierre Auger Observatory},
author = {Risse, Markus and /Karlsruhe, Forschungszentrum},
abstractNote = {Based on observations of the depth of shower maximum performed with the hybrid detector of the Auger Observatory, an upper limit on the cosmic-ray photon fraction of 26% (at 95% confidence level) is derived for primary energies above 10{sup 19} eV. Additional observables recorded with the surface detector array, available for a sub-set of the data sample, support the conclusion that a photon origin of the observed events is not favoured.},
doi = {},
url = {https://www.osti.gov/biblio/15020266}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2005},
month = {7}
}

Conference:
Other availability
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