380 citations · 4.4k across the 119 of their papers we have counts for
9 papers · 1 filter
On the transition from Galactic to extragalactic cosmic-rays: spectral and composition features from two opposite scenarios
D. Allard, E. Parizot, A. V. Olinto
We study the phenomenology of cosmic-rays (CRs) at the galactic/extragalactic transition, focusing on two opposite models for the composition of the extragalactic (EG) component. M…
Aperture calculation of the Pierre Auger Observatory surface detector
D. Allard, I. Allekotte, E. Armengaud +11
We determine the instantaneous aperture and integrated exposure of the surface detector of the Pierre Auger Observatory, taking into account the trigger efficiency as a function of…
The trigger system of the Pierre Auger Surface Detector: operation, efficiency and stability
D. Allard, E. Armengaud, I. Allekotte +31
The trigger system of the Surface Detector (SD) of the Pierre Auger Observatory is described, from the identification of candidate showers ( EeV) at the level of a single stat…
Extragalactic cosmic-ray source composition and the interpretation of the ankle
D. Allard, E. Parizot, A. V. Olinto +2
We consider the stochastic propagation of high-energy protons and nuclei in the cosmological microwave and infrared backgrounds, using revised photonuclear cross-sections and follo…
Detecting gamma-ray bursts with the Pierre Auger Observatory using the single particle technique
D. Allard, E. Parizot, X. Bertou +4
During the past ten years, gamma-ray bursts (GRB) have been extensively studied in the keV-MeV energy range but the high energy emission still remain mysterious. Ground based obser…
UHE nuclei propagation and the interpretation of the ankle in the cosmic-ray spectrum
D. Allard, E. Parizot, E. Khan +2
We consider the stochastic propagation of high-energy protons and nuclei in the cosmological microwave and infrared backgrounds, using revised photonuclear cross-sections and follo…