Experimental challenges of UHECR
- Bruce Dawson (University of Adelaide)
Douglas Bergman (U)
HiRes was the first experiment to observe the GZK Cutoff. This was accomplished using the fluorescence technique with monocular reconstruction with a heavy reliance on Data/MC comparison techniques borrowed from particle physics. This result was later confirmed using stereo reconstruction and by the Pierre Auger Observatory. The HiRes result is consistent with the original motivation for the...
102. Measurement of the energy spectrum of cosmic rays at highest energies using the Pierre Auger Observatory
We report a measurement of the flux of cosmic rays with unprecedented precision and statistics using the Pierre Auger Observatory. Based on fluorescence observations in coincidence with at least one surface detector we derive a spectrum for energies above 10^18 eV. We also report on the energy spectrum obtained with surface detector arrays of 1500m and 750m spacing for events with zenith...
Anatoly Ivanov (Shafer Institute for Cosmophysical Research & Aeronomy)
The results of the Yakutsk array experiment aimed at investigations of ultra-high energy cosmic rays are presented. We outline the current status of the instrument and an outlook for future directions and areas of study.
Yoshiki Tsunesada (Tokyo Institute of Technology)
Dr Bianca Keilhauer (KIT)
Extensive air showers initiate the fluorescence emissions from nitrogen molecules in air. The UV-light is emitted isotropically and can be used for observing the longitudinal development of extensive air showers in the atmosphere over many kilometers. This measurement technique is well established since it has been used since many decades by several cosmic ray experiments. However, a...