Upper limit on the cosmic-ray photon flux above 1019eV using the surface detector of the Pierre Auger Observatory

J. Abraham, P. Abreu, M. Aglietta, C. Aguirre, D. Allard, I. Allekotte, J. Allen, P. Allison, Jaime Álvarez-Muñiz, M. Ambrosio,

Astroparticle Physics · 2008 · 213 citations · 60 references

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