PoS - Proceedings of Science
Volume 301 - 35th International Cosmic Ray Conference (ICRC2017) - Session Cosmic-Ray Indirect. CRI-properties of CRs at high energies (anisotropy, energy, mass)
The Cosmic Ray Spectrum above 0.1 EeV measured by the Telescope Array and TALE Fluorescence Detectors
J. Kim*, D.Y. Ivanov, G. Thomson and  On behalf of the Telescope Array collaboration
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Pre-published on: August 16, 2017
Published on: August 03, 2018
The Telescope Array (TA) is the largest cosmic ray detector in the Northern hemisphere. Initially designed to study ultra high energy cosmic rays of energies above $10^{18}$ eV. The Telescope Array Low-energy Extension (TALE) extends the sensitivity of TA down to $10^{15.6}$ eV. The original TA consists of three fluorescence detectors, viewing 3$^{\circ}$ to 31$^{\circ}$ in elevation each, and overlooking an array of scintillation counters. TALE adds additional fluorescence telescopes at the TA Middle Drum (MD) fluorescence detector site, and overlooking a graded infill array of counters. Together, TALE and MD see a combined sky coverage of 114$^{\circ}$ in azimuth and 3-59$^{\circ}$ in elevation. In this work, we present a first measurement of the energy spectrum made by the combined TALE and MD fluorescence detectors operating in monocular mode.
DOI: https://doi.org/10.22323/1.301.0521
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