Updated comparison of the UHECR energy spectra measured by the Pierre Auger Observatory and the Telescope Array
The Pierre Auger and Telescope Array joint Working Group on the UHECR energy spectrum was established in 2012 to analyze energy scale uncertainties in both experiments and to investigate their systematic differences, particularly in the spectral shape of the flux measurements. Previous studies have indeed shown that, within systematic uncertainties, the energy spectra measured by the two observatories are consistent below $10\,\mathrm{EeV}$. However, at higher energies, a significant difference remains. In this work, we re-examine this discrepancy in greater detail and explore its possible origins. We consider systematic and statistical uncertainties, including the conversion from directly measured observables to energy and the calculation of exposures. We present an updated energy scale comparison between the two experiments and updated flux measurements in the common declination band.
Authors
- F. Salamida (ORCID: https://orcid.org/0000-0002-9306-8447)
Publication Details
- Published
- 2025-09-24
- DOI
- https://doi.org/10.22323/1.501.0381
- Citations
- 1
- Primary Topic
- Particle Accelerators and Free-Electron Lasers
- Type
- article
- Field-Weighted Citation Impact
- 0.73
Funders
- National Science Foundation
- University of Utah
- Strong
- European Commission
- National Research Foundation
- Deutsche Forschungsgemeinschaft
- Agence Nationale de la Recherche
- Fundação de Amparo à Pesquisa do Estado de São Paulo
- Ministerstvo Školství, Mládeže a Tělovýchovy
- Grantová Agentura České Republiky
- Academia Sinica
- Bundesministerium für Bildung und Forschung
- Fonds De La Recherche Scientifique - FNRS
- Consejo Nacional de Investigaciones Científicas y Técnicas
- Fonds Wetenschappelijk Onderzoek
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- National Research Foundation of Korea
- Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
- University of Tokyo
- Centre National de la Recherche Scientifique
- Financiadora de Estudos e Projetos
- Forskningsrådet om Hälsa, Arbetsliv och Välfärd
- Ministério da Ciência, Tecnologia, Inovações e Comunicações
- Vlaamse regering
- Ministry of Science and Higher Education of the Russian Federation
- Ministerium für Kultur und Wissenschaft des Landes Nordrhein-Westfalen
- Helmholtz Alliance for Astroparticle Physics
- U.S. Air Force
- U.S. Bureau of Land Management
- Japan Society for the Promotion of Science
- Agencia Nacional de Promoción Científica y Tecnológica
- RIKEN
- Institut National de Physique Nucléaire et de Physique des Particules
- Institute for Cosmic Ray Research, University of Tokyo