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arxiv: 1304.5614 · v2 · submitted 2013-04-20 · 🌌 astro-ph.HE · hep-ex· hep-ph

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Upper limit on the flux of photons with energies above 10¹9 eV using the Telescope Array surface detector

T. Abu-Zayyad , R. Aida , M. Allen , R. Anderson , R. Azuma , E. Barcikowski , J.W. Belz , D.R. Bergman
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classification 🌌 astro-ph.HE hep-exhep-ph
keywords photonsabovearraydetectorenergiesfluxsurfacetelescope
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We search for ultra-high energy photons by analyzing geometrical properties of shower fronts of events registered by the Telescope Array surface detector. By making use of an event-by-event statistical method, we derive upper limits on the absolute flux of primary photons with energies above 10^19, 10^19.5 and 10^20 eV based on the first three years of data taken.

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