Medina-Tanco, Gustavo, Collaboration, For The Auger
BATATA is a hodoscope comprising three X-Y planes of plastic scintillation detectors. This system of buried counters is complemented by an array of 3 water-Cherenkov detectors, located at the...
Studying individual UHECR sources with high statistics (2009)
One of the main impacts of the JEM-EUSO mission will come from its unprecedented exposure. This feature creates, for the first time in the field, the possibility of studying individual UHECR sources....
JEM-EUSO Science Objectives (2009)
Medina-Tanco, Gustavo, Asano, K., Cline, D., Ebisuzaki, T., Inoue, S., Lipari, P., ...
JEM-EUSO, on board of the Japanese Exploration Module of the International Space Station, is being proposed as the first space observatory devoted to UHECR. Its privileged position at 430 km above...
Localized Galactic sources and their contribution beyond the second knee (2009)
De Donato, Cinzia, Medina-Tanco, Gustavo
The energy range encompassing the ankle of the cosmic ray energy spectrum probably marks the exhaustion of the accelerating sources in our Galaxy, as well as the end of the Galactic confinement....
Astrophysics Motivation behind the Pierre Auger Southern Observatory Enhancements (2007)
The Pierre Auger Collaboration intends to extend the energy range of its southern observatory in Argentina for high quality data from 0.1 to 3 EeV. The extensions, described in accompanying papers,...
De Souza, Vitor, Medina-Tanco, Gustavo, Ortiz, Jeferson A., Sanchez, Federico
The fluorescence technique has been successfully used to detect ultrahigh energy cosmic rays by indirect measurements. The underlying idea is that the number of charged particles in the atmospheric...
De Souza, Vitor, Medina-Tanco, Gustavo, Ortiz, Jeferson A.
Along the years HiRes and AGASA experiments have explored the fluorescence and the ground array experimental techniques to measure extensive air showers, being both essential to investigate the...
Analysis of extensive air showers with the hybrid code SENECA (2005)
Ortiz, Jeferson A., De Souza, Vitor, Medina-Tanco, Gustavo
The ultrahigh energy tail of the cosmic ray spectrum has been explored with unprecedented detail. For this reason, new experiments are exerting a severe pressure on extensive air shower modeling....
De Souza, Vitor, Medina-Tanco, Gustavo, Ortiz, Jeferson A.
The HiRes and AGASA Collaborations have published contradictory energy spectra for energies above the GZK cut-off. In this article, we investigate the acceptance of fluorescence telescopes to...
Alternative energy estimation from the shower lateral distribution function (2005)
De Souza, Vitor, Escobar, Carlos O., Brito, Joel, Dobrigkeit, Carola, Medina-Tanco, Gustavo
The surface detector technique has been successfully used to detect cosmic ray showers for several decades. Scintillators or Cerenkov water tanks can be used to measure the number of particles and/or...
Analysis of shower size as estimator of extensive air shower energy (2005)
De Souza, Vitor, Ortiz, Jeferson A., Medina-Tanco, Gustavo, Sanchez, Federico
The fluorescence technique has been successfully used to detect ultrahigh energy cosmic rays by indirect measurements. The underlying idea is that the number of charged particles in the atmospheric...
Fluorescence photons produced in air by extensive air showers (2004)
De Souza, Vitor, Medina-Tanco, Gustavo, Ortiz, Jeferson A.
The air fluorescence technique has long been used to detect extensive air showers and to reconstruct its geometry and energy. The fluorescence photon yield of an electron in air is of main importance...
Ultra high energy cosmic ray sources & experimental results (2003)
Biermann, Peter L., Medina-Tanco, Gustavo
Here we discuss the latest developments in the debate, where the ultrahigh energy cosmic ray particles come from. In this brief review, we emphasize the predictions that necessarily follow from the...
Isotropization of Ultra-High Energy Cosmic Ray Arrival Directions by Radio Ghosts (2000)
Medina-Tanco, Gustavo, Ensslin, Torsten A.
The isotropy in the ultra high energy cosmic ray (UHECR) flux observed by Yakutsk and AGASA experiments, is a very strong constraint to production and propagation models alike. Most of the scenarios...
Ultra-high energy cosmic rays: are they isotropic? (2000)
From the analysis of AGASA data above $4 \times 10^{19}$ eV, we show that the ultra-high energy cosmic rays flux is neither purely isotropic, nor reflects the expected anisotropy from a pure source...
On the ongoing multiple blowout in NGC 604 (2000)
Tenorio-Tagle, Guillermo, Muñoz-Tuñón, Casiana, Pérez, Enrique, Maíz-Apellániz, Jesús, Medina-Tanco, Gustavo
Several facts regarding the structure of NGC 604 are examined here. The three main cavities, produced by the mechanical energy from massive stars which in NGC 604 are spread over a volume of 10$^6$...
The origin of the highest energy cosmic rays Do all roads lead back to Virgo? (1999)
Ahn, Eun-Joo, Medina-Tanco, Gustavo, Biermann, Peter L., Stanev, Todor
Introducing a simple Galactic wind model patterned after the solar wind we show that back-tracing the orbits of the highest energy cosmic events suggests that they may all come from the Virgo...