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The energy spectrum of ultra-high energy cosmic rays measured at the Pierre Auger Observatory and at the Telescope Array
- Source :
- PoS, 36th International Cosmic Ray Conference, 36th International Cosmic Ray Conference, Jul 2019, Madison, United States. pp.234, ⟨10.22323/1.358.0234⟩
- Publication Year :
- 2019
- Publisher :
- HAL CCSD, 2019.
-
Abstract
- The energy spectrum of ultra-high energy cosmic rays (UHECRs) provides essential information on the most energetic phenomena in the Universe. Beyond EeV energies, the Telescope Array and Pierre Auger Observatory have the largest exposures to UHECRs ever accumulated in the Northern and Southern hemispheres, respectively. The results show independently a steepening of the energy spectrum above a few tens of EeV. However, the comparison of the spectra shows differences that are not explainable in terms of an overall uncertainty on the energy scale used to reconstruct the extensive air showers. The differences are also observed in the region of the sky covered by both instruments, where the spectra should be in agreement within uncertainties when directional-exposure effects are accounted for. For this contribution, a working group from both collaborations examined these differences considering the energy-dependent systematic uncertainties. A special focus is given to the characterization of the spectral features, which provide an accurate tool to enhance our understanding of the comparisons.<br />Comment: Proceedings of 36th International Cosmic Ray Conference
- Subjects :
- air
media_common.quotation_subject
Astrophysics::High Energy Astrophysical Phenomena
energy spectrum
FOS: Physical sciences
Astrophysics
01 natural sciences
Spectral line
law.invention
energy dependence
Telescope
law
0103 physical sciences
Energy spectrum
Ultra-high-energy cosmic ray
cosmic radiation: UHE
010303 astronomy & astrophysics
media_common
Pierre Auger Observatory
Physics
High Energy Astrophysical Phenomena (astro-ph.HE)
showers: atmosphere
010308 nuclear & particles physics
Astrophysics::Instrumentation and Methods for Astrophysics
Characterization (materials science)
Auger
observatory
Sky
spectral
Astrophysics - High Energy Astrophysical Phenomena
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Energy (signal processing)
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- PoS, 36th International Cosmic Ray Conference, 36th International Cosmic Ray Conference, Jul 2019, Madison, United States. pp.234, ⟨10.22323/1.358.0234⟩
- Accession number :
- edsair.doi.dedup.....bb4d09048dd1b05d366e15e6ee8f9e48