EPJ Web of Conferences
Volume 53, 2013UHECR 2012 - International Symposium on Future Directions in UHECR Physics
|Number of page(s)||11|
|Section||Cosmic Ray Observations|
|Published online||25 June 2013|
HiRes and TA spectrum measurements
Dept. of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA
a e-mail: email@example.com
The High Resolution Fly's Eye and Telescope Array experiment are separate experiments, although there is significant overlap in both equipment and personnel. Despite using different measurement techniques the two experiments provide nearly identical measurements of the UHECR cosmic ray spectrum, with agreement in overall flux level and the positions of the spectral features of the Ankle and the GZK Cutoff. This similarity arises despite using entirely different detector techniques. What unites the measurements from the two experiments is the experimental methodology of a thoroughgoing use of Monte Carlo detector simulations which are required to produce distributions of observables which are the same as those in the actual data. The detector simulation is then used to estimate exposures and acceptances which are not directly measurable. The procedure of verification through data/MC comparisons removes many of the systematic errors associate with model assumptions inherent in the MC simulation.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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