Research Interests: Physics, Nuclear Physics, High Energy Astrophysics, Astroparticle physics, Astrophysics, and 15 moreFísica, Longitudinal, Astronomía, Asymmetry, Physical, Observatory, American physical society, Shower, Showers, Enseñanza - Aprendizaje Ciencias Naturales Y Exactas, Mass Estimates, Detector, Ciencias Fisicas, Azimuth, and Zenith
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Contributions of the Pierre Auger Collaboration to the 33rd International Cosmic Ray Conference, Rio de Janeiro, Brazil, July 2013
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Centauro-type and Mini-Centauro-type events are reported and discussed. They are events in which nuclear-active particles (i.e. hadrons which do not undergo rapid photon decays) are produced without any sign of accompanying neutral pion... more
Centauro-type and Mini-Centauro-type events are reported and discussed. They are events in which nuclear-active particles (i.e. hadrons which do not undergo rapid photon decays) are produced without any sign of accompanying neutral pion emission. Estimated hadron multiplicity is ∠100 for Centauro-type and ∠15 for Mini-Centauro-type. Up to the present moment, 5 examples of Centauro and 13 of Mini-Centauro have been observed in the two-storey emulsion chambers exposed on Mt. Chacaltaya, Bolivia (5220 m above sea level). The experimental results on energy and angular distributions are in agreement with the hypothesis that this type of events occur through production and decay of a fire-ball with a rest energy of (200∠300) GeV/c2 for Centauro and ∠30 GeV/c2 for Mini-Centauro events.
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The advent of the Auger Engineering Radio Array (AERA) necessitates the development of a powerful framework for the analysis of radio measurements of cosmic ray air showers. As AERA performs “radio-hybrid” measurements of air shower radio... more
The advent of the Auger Engineering Radio Array (AERA) necessitates the development of a powerful framework for the analysis of radio measurements of cosmic ray air showers. As AERA performs “radio-hybrid” measurements of air shower radio emission in coincidence with the surface particle detectors and fluorescence telescopes of the Pierre Auger Observatory, the radio analysis functionality had to be incorporated in the existing hybrid analysis solutions for fluorescence and surface detector data. This goal has been achieved in a natural way by extending the existing Auger Offline software framework with radio functionality. In this article, we lay out the design, highlights and features of the radio extension implemented in the Auger Offline framework. Its functionality has achieved a high degree of sophistication and offers advanced features such as vectorial reconstruction of the electric field, advanced signal processing algorithms, a transparent and efficient handling of FFTs, a...
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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 energy threshold, 6× 1019eV. The anisotropy was measured... more
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 energy threshold, 6× 1019eV. The anisotropy was measured by the fraction of arrival directions that are less than 3.1° from the position of an active galactic nucleus within 75Mpc (using the Véron-Cetty and Véron 12th catalog). An updated measurement of this fraction is reported here using the arrival directions of cosmic rays recorded above the same energy ...