A Measurement of the UHECR Spectrum with the HiRes FADC Detector

Abstract

We have measured the energy spectrum of ultra-high energy cosmic rays (UHECR) with the HiRes FADC detector (HiRes-2) in monocular mode. A detailed Monte Carlo simulation of the detector response to air showers has been used to calculate the energy dependent acceptance of the air fluorescence detector. The measured spectrum complements the measurement by the HiRes-1 detector down to lower energies. Systematic effects of the assumed input spectrum and composition on the aperture are presented, as well as systematics due to the atmosphere.

arXiv comment6 pages, 8 figures, to be included in the CRIS '04 (Cosmic Ray International Seminar) proceedings (Nucl. Phys. B)

References in corpus (2)

• Measurement of the Flux of Ultrahigh Energy Cosmic Rays from Monocular Observations by the High Resolution Fly's Eye Experiment
• A Multi-Component Measurement of the Cosmic Ray Composition Between 10^{17} eV and 10^{18} eV

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• Propagation of UHE protons through a magnetized large scale structure