Measurement of the Flux of Ultrahigh Energy Cosmic Rays from Monocular Observations by the High Resolution Fly's Eye Experiment

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  • 5 September 2002
Abstract
We have measured the cosmic ray spectrum above 10^17 eV using the two air fluorescence detectors of the High Resolution Fly's Eye observatory operating in monocular mode. We describe the detector, photo-tube and atmospheric calibrations, and the analysis techniques for the two detectors. We fit the spectrum to a model consisting of galactic and extra-galactic sources. The measured spectrum is consistent with this two-component model including the GZK cutoff.

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