@article{6f16739fd7d8444fb1b2cdab7decdb3f,
title = "Features of the energy spectrum of cosmic rays above 2.5×1018 eV using the pierre auger observatory",
abstract = "We report a measurement of the energy spectrum of cosmic rays above 2.5×1018 eV based on 215 030 events. New results are presented: at about 1.3×1019 eV, the spectral index changes from 2.51±0.03(stat)±0.05(syst) to 3.05±0.05(stat)±0.10(syst), evolving to 5.1±0.3(stat)±0.1(syst) beyond 5×1019 eV, while no significant dependence of spectral features on the declination is seen in the accessible range. These features of the spectrum can be reproduced in models with energy-dependent mass composition. The energy density in cosmic rays above 5×1018 eV is [5.66±0.03(stat)±1.40(syst)]×1053 erg Mpc-3.",
author = "\{(The Pierre Auger Collaboration)\} and A. Aab and P. Abreu and M. Aglietta and Albury, \{J. M.\} and I. Allekotte and A. Almela and \{Alvarez Castillo\}, J. and J. Alvarez-Mu{\~n}iz and \{Alves Batista\}, R. and Anastasi, \{G. A.\} and L. Anchordoqui and B. Andrada and S. Andringa and C. Aramo and \{Ara{\'u}jo Ferreira\}, \{P. R.\} and H. Asorey and P. Assis and G. Avila and Badescu, \{A. M.\} and A. Bakalova and A. Balaceanu and F. Barbato and \{Barreira Luz\}, \{R. J.\} and Becker, \{K. H.\} and Bellido, \{J. A.\} and C. Berat and Bertaina, \{M. E.\} and X. Bertou and Biermann, \{P. L.\} and T. Bister and J. Biteau and A. Blanco and J. Blazek and C. Bleve and M. Boh{\'a}{\v c}ov{\'a} and D. Boncioli and C. Bonifazi and \{Bonneau Arbeletche\}, L. and N. Borodai and Botti, \{A. M.\} and J. Brack and T. Bretz and Briechle, \{F. L.\} and P. Buchholz and A. Bueno and S. Buitink and M. Buscemi and Caballero-Mora, \{K. S.\} and L. Caccianiga and \{Van Vliet\}, A.",
note = "Funding Information: The successful installation, commissioning, and operation of the Pierre Auger Observatory would not have been possible without the strong commitment and effort from the technical and administrative staff in Malarg{\"u}e. We are very grateful to the following agencies and organizations for financial support: Publisher Copyright: {\textcopyright} 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.",
year = "2020",
month = sep,
doi = "10.1103/PhysRevLett.125.121106",
language = "British English",
volume = "125",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "12",
}