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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/17213

Title: Depth of maximum of air-shower profiles at the Pierre Auger Observatory. I. Measurements at energies above 1017.8  eV
Other Titles: Physical Review -Series d-
Authors: Abreu, P.
Aab, A.
Aglietta, M.
Ahn, E. J.
Samarai, I. Al
Albuquerque, Ivone Freire da Mota e
Allekotte, I.
Allen, J.
Pepe, Iuri Muniz
Issue Date: 2014
Abstract: We report a study of the distributions of the depth of maximum, Xmax, of extensive air-shower profiles with energies above 1017.8  eV as observed with the fluorescence telescopes of the Pierre Auger Observatory. The analysis method for selecting a data sample with minimal sampling bias is described in detail as well as the experimental cross-checks and systematic uncertainties. Furthermore, we discuss the detector acceptance and the resolution of the Xmax measurement and provide parametrizations thereof as a function of energy. The energy dependence of the mean and standard deviation of the Xmax distributions are compared to air-shower simulations for different nuclear primaries and interpreted in terms of the mean and variance of the logarithmic mass distribution at the top of the atmosphere.
Description: p.1-25
URI: http://repositorio.ufba.br/ri/handle/ri/17213
ISSN: http://dx.doi.org/10.1103/PhysRevD.90.122005
Appears in Collections:Artigos Publicados em Periódicos (FIS)

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