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Title:Telescope Array 10-Year Monocular Spectrum Measurement
Authors:ID Bergman, D. (Author)
ID Lundquist, Jon Paul (Author), et al.
Files:.pdf ICRC2021_339.pdf (1,91 MB)
MD5: 9A03139D7B9E69AB33AADE21AA69C695
 
URL https://pos.sissa.it/395/339/
 
URL https://pos.sissa.it/395/339/pdf
 
Language:English
Work type:Not categorized
Typology:1.08 - Published Scientific Conference Contribution
Organization:UNG - University of Nova Gorica
Abstract:Telescope Array (TA) is the largest cosmic ray detector in the northern hemisphere. We present a measurement of the cosmic ray energy spectrum for energies above 10^17.5 eV using fluorescence telescopes in monocular mode. A novel weather classification scheme using machine learning was used to select data parts with good weather to ensure the quality of the fluorescence data. The data from the Black Rock Mesa (BR) and Long Ridge (LR) fluorescence telescope stations were analysed separately in monocular mode, with the calculated fluxes combined into a single spectrum. The 10-year monocular combined cosmic ray energy spectrum is in excellent agreement with previous measurements from the northern hemisphere. We present fits of the combined spectrum to a series of broken power law models. A thrice-broken power law is observed to be the best fit considering the Poisson deviance per degrees of freedom. The three breaks suggest an additional feature of the spectrum between the previously observed Ankle at 10^18.7 eV and the GZK suppression at 10^19.8 eV.
Keywords:Telescope Array, indirect detection, fluorescence detection, ultra-high energy, cosmic rays, energy spectrum, composition, machine learning, weather classification
Publication status:Published
Year of publishing:2022
PID:20.500.12556/RUNG-8504 New window
COBISS.SI-ID:166662147 New window
DOI:10.22323/1.395.0339 New window
NUK URN:URN:SI:UNG:REP:HYOWHGPP
Publication date in RUNG:02.10.2023
Views:2433
Downloads:6
Metadata:XML DC-XML DC-RDF
:
BERGMAN, D. and LUNDQUIST, Jon Paul, 2022, Telescope Array 10-Year Monocular Spectrum Measurement. In : 37th International Cosmic Ray Conference [online]. Published Scientific Conference Contribution. Trieste, Italy. 2022. [Accessed 4 April 2025]. Retrieved from: https://repozitorij.ung.si/IzpisGradiva.php?lang=eng&id=8504
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Record is a part of a monograph

Title:37th International Cosmic Ray Conference : ICRC2023
Place of publishing:Trieste, Italy
Publisher:Proceedings of Science
Year of publishing:2022

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License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
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