380 citations · 4.4k across the 119 of their papers we have counts for
9 papers · 2 filters
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…
Generalised 3D-reconstruction method of a dipole anisotropy in cosmic-ray distributions
J. Aublin, E. Parizot
We develop a method to study the anisotropy of a cosmic-ray angular distribution, using both the right ascension and the declination of the arrival directions. It generalises the f…
Indirect manifestation of GRBs in the Galaxy: Compton trails and positrons
Etienne Parizot
Two independent indirect manifestations of Galactic gamma-ray bursts (GRBs) are considered, whose importance for gamma-ray astronomy will depend on a still poorly known -- though a…
Cosmic-rays: an unsolved mystery at all energies!
E. Parizot
We consider the phenomenology of cosmic-rays (CRs) and stress the interest of jointly studying their properties over the whole energy spectrum. While UHECRs are known to raise impo…