HiRes Stereo Cosmic Rays Composition Measurements

Collaboration
for the collaboration.
Jul 4, 2007
4 pages
Contribution to:
  • Published: Jul 4, 2007
Experiments:

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Abstract: (INDICO)
The High Resolution Fly's Eye (HiRes) fluorescence detectors have been collecting extensive air shower (EAS) data for more than 6 years . The obtained statistics allows us to more precisely estimate the mass composition of the ultra high energy cosmic rays (UHECR). In this study we summarize the stereo shower parameters measurements, especially X_{max} measurements. The sensitivity limitations of our detector, the effect of the hadronic model choice on the estimate, and systematic errors of our measurements are also presented.