We report a study of the distributions of the depth of maximum, X max, of extensive air-shower
profiles with energies above 1 0 17.8 eV as observed with the fluorescence telescopes of …

Data collected by the Pierre Auger Observatory through 31 August 2007 showed evidence
for anisotropy in the arrival directions of cosmic rays above the Greisen–Zatsepin–Kuz’min …

Using the data taken at the Pierre Auger Observatory between December 2004 and December
2012, we have examined the implications of the distributions of depths of atmospheric …

We report a measurement of the proton-air cross section for particle production at the center-of-mass
energy per nucleon of 57 TeV. This is derived from the distribution of the depths of …

A study was carried out on the infectivity to sandflies of 16 dogs naturally parasitized by
Leishmania infantum. All dogs were seropositive and the parasite had been isolated from all …

We present the first hybrid measurement of the average muon number in air showers at
ultrahigh energies, initiated by cosmic rays with zenith angles between 62 and 80. The …

Root growth of two drought tolerant and two drought sensitive bean (Phaseolus vulgaris L.)
lines was compared at two locations in Colombia differing primarily in soil conditions. At …

We report a measurement of the energy spectrum of cosmic rays for energies above 2.5× 10
18 eV based on 215,030 events recorded with zenith angles below 60. A key feature of the …

We present a combined fit of a simple astrophysical model of UHECR sources to both the
energy spectrum and mass composition data measured by the Pierre Auger Observatory. The …

… Alvarez Castillo 57 , J. Alvarez-Muñiz 74 , R. Alves Batista 41 , M. … Baus 36 , JJ Beatty
86 , KH Becker 35 , JA Bellido 12 , C. Berat 32 , ME Bertaina 53 , X. Bertou 1 , PL Biermann …