Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/23872
Title: | Measurement of the cosmic ray spectrum above 4 × 10<SUP>18</SUP> eV using inclined events detected with the Pierre Auger Observatory | Authors: | Pierre Auger Collaboration AGLIETTA, MARCO CASTELLINA, ANTONELLA GORGI, Alessio MESSINA, Sergio RIGGI, Simone SEGRETO, ALBERTO Zuccarello, Francesca |
Issue Date: | 2015 | Journal: | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | Number: | 2015 | Issue: | 8 | First Page: | 049 | Abstract: | A measurement of the cosmic-ray spectrum for energies exceeding 4×10<SUP>18</SUP> eV is presented, which is based on the analysis of showers with zenith angles greater than 60° detected with the Pierre Auger Observatory between 1 January 2004 and 31 December 2013. The measured spectrum confirms a flux suppression at the highest energies. Above 5.3×10<SUP>18</SUP> eV, the ``ankle'', the flux can be described by a power law E<SUP>-γ</SUP> with index γ=2.70 ± 0.02 (stat) ± 0.1 (sys) followed by a smooth suppression region. For the energy (E<SUB>s</SUB>) at which the spectral flux has fallen to one-half of its extrapolated value in the absence of suppression, we find E<SUB>s</SUB>=(5.12±0.25 (stat)<SUP>+1.0</SUP><SUB>-1.2</SUB> (sys))×10<SUP>19</SUP> eV. | URI: | http://hdl.handle.net/20.500.12386/23872 | URL: | https://iopscience.iop.org/article/10.1088/1475-7516/2015/08/049 | ISSN: | 1475-7516 | DOI: | 10.1088/1475-7516/2015/08/049 | Bibcode ADS: | 2015JCAP...08..049P | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
1503.07786-doi10.10881475-7516201508049.pdf | postprint | 814.94 kB | Adobe PDF | View/Open |
Page view(s)
73
checked on Sep 11, 2024
Download(s)
21
checked on Sep 11, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.