Abstract
We report a measurement of the flux of cosmic rays with unprecedented precision and statistics using the Pierre Auger Observatory. Based on fluorescence observations in coincidence with at least one surface detector we derive a spectrum for energies above 10{sup 18} eV. We also update the previously published energy spectrum obtained with the surface detector array. The two spectra are combined addressing the systematic uncertainties and, in particular, the influence of the energy resolution on the spectral shape. The spectrum can be described by a broken power law E{sup -g}amma with index gamma=3.3 below the ankle which is measured at log{sub 10}(E{sub ankle}/eV)=18.6. Above the ankle the spectrum is described by a power law with index 2.6 followed by a flux suppression, above about log{sub 10}(E/eV)=19.5, detected with high statistical significance.
Abraham, J;
[1]
Abreu, P;
[2]
Aglietta, M;
[3]
Ahn, E J;
[4]
Allard, D;
[5]
Allen, J;
[6]
Alvarez-Muniz, J;
[7]
Ambrosio, M;
[8]
Anchordoqui, L;
[9]
Andringa, S;
[2]
Anticic, T;
[10]
Anzalone, A;
[11]
Aramo, C;
[8]
Arganda, E;
[12]
Arisaka, K;
[13]
Arqueros, F;
[12]
Asorey, H;
[14]
Assis, P;
[2]
Aublin, J;
[15]
Ave, M;
[16]
University of Chicago, Enrico Fermi Institute, Chicago, IL (United States)]
- National Technological University, Faculty Mendoza (CONICET/CNEA), Mendoza (Argentina)
- LIP and Instituto Superior Tecnico, Lisboa (Portugal)
- Istituto di Fisica dello Spazio Interplanetario (INAF), Universita di Torino and Sezione INFN, Torino (Italy)
- Fermilab, Batavia, IL (United States)
- Laboratoire AstroParticule et Cosmologie (APC), Universite Paris 7, CNRS-IN2P3, Paris (France)
- New York University, New York, NY (United States)
- Universidad de Santiago de Compostela (Spain)
- Universita di Napoli 'Federico II' and Sezione INFN, Napoli (Italy)
- University of Wisconsin, Milwaukee, WI (United States)
- Rudjer Boskovic Institute, 10000 Zagreb (Croatia)
- Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo (INAF), Palermo (Italy)
- Universidad Complutense de Madrid, Madrid (Spain)
- University of California, Los Angeles, CA (United States)
- Centro Atomico Bariloche and Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche (Argentina)
- Laboratoire de Physique Nucleaire et de Hautes Energies (LPNHE), Universites Paris 6 et Paris 7, CNRS-IN2P3, Paris (France)
- Karlsruhe Institute of Technology - Campus North - Institut fuer Kernphysik, Karlsruhe (Germany)
Citation Formats
Abraham, J, Abreu, P, Aglietta, M, Ahn, E J, Allard, D, Allen, J, Alvarez-Muniz, J, Ambrosio, M, Anchordoqui, L, Andringa, S, Anticic, T, Anzalone, A, Aramo, C, Arganda, E, Arisaka, K, Arqueros, F, Asorey, H, Assis, P, Aublin, J, Ave, M, and University of Chicago, Enrico Fermi Institute, Chicago, IL (United States)].
Measurement of the energy spectrum of cosmic rays above 10{sup 18} eV using the Pierre Auger Observatory.
Netherlands: N. p.,
2010.
Web.
doi:10.1016/j.physletb.2010.02.013.
Abraham, J, Abreu, P, Aglietta, M, Ahn, E J, Allard, D, Allen, J, Alvarez-Muniz, J, Ambrosio, M, Anchordoqui, L, Andringa, S, Anticic, T, Anzalone, A, Aramo, C, Arganda, E, Arisaka, K, Arqueros, F, Asorey, H, Assis, P, Aublin, J, Ave, M, & University of Chicago, Enrico Fermi Institute, Chicago, IL (United States)].
Measurement of the energy spectrum of cosmic rays above 10{sup 18} eV using the Pierre Auger Observatory.
Netherlands.
https://doi.org/10.1016/j.physletb.2010.02.013
Abraham, J, Abreu, P, Aglietta, M, Ahn, E J, Allard, D, Allen, J, Alvarez-Muniz, J, Ambrosio, M, Anchordoqui, L, Andringa, S, Anticic, T, Anzalone, A, Aramo, C, Arganda, E, Arisaka, K, Arqueros, F, Asorey, H, Assis, P, Aublin, J, Ave, M, and University of Chicago, Enrico Fermi Institute, Chicago, IL (United States)].
2010.
"Measurement of the energy spectrum of cosmic rays above 10{sup 18} eV using the Pierre Auger Observatory."
Netherlands.
https://doi.org/10.1016/j.physletb.2010.02.013.
@misc{etde_21355806,
title = {Measurement of the energy spectrum of cosmic rays above 10{sup 18} eV using the Pierre Auger Observatory}
author = {Abraham, J, Abreu, P, Aglietta, M, Ahn, E J, Allard, D, Allen, J, Alvarez-Muniz, J, Ambrosio, M, Anchordoqui, L, Andringa, S, Anticic, T, Anzalone, A, Aramo, C, Arganda, E, Arisaka, K, Arqueros, F, Asorey, H, Assis, P, Aublin, J, Ave, M, and University of Chicago, Enrico Fermi Institute, Chicago, IL (United States)]}
abstractNote = {We report a measurement of the flux of cosmic rays with unprecedented precision and statistics using the Pierre Auger Observatory. Based on fluorescence observations in coincidence with at least one surface detector we derive a spectrum for energies above 10{sup 18} eV. We also update the previously published energy spectrum obtained with the surface detector array. The two spectra are combined addressing the systematic uncertainties and, in particular, the influence of the energy resolution on the spectral shape. The spectrum can be described by a broken power law E{sup -g}amma with index gamma=3.3 below the ankle which is measured at log{sub 10}(E{sub ankle}/eV)=18.6. Above the ankle the spectrum is described by a power law with index 2.6 followed by a flux suppression, above about log{sub 10}(E/eV)=19.5, detected with high statistical significance.}
doi = {10.1016/j.physletb.2010.02.013}
journal = []
issue = {4-5}
volume = {685}
place = {Netherlands}
year = {2010}
month = {Mar}
}
title = {Measurement of the energy spectrum of cosmic rays above 10{sup 18} eV using the Pierre Auger Observatory}
author = {Abraham, J, Abreu, P, Aglietta, M, Ahn, E J, Allard, D, Allen, J, Alvarez-Muniz, J, Ambrosio, M, Anchordoqui, L, Andringa, S, Anticic, T, Anzalone, A, Aramo, C, Arganda, E, Arisaka, K, Arqueros, F, Asorey, H, Assis, P, Aublin, J, Ave, M, and University of Chicago, Enrico Fermi Institute, Chicago, IL (United States)]}
abstractNote = {We report a measurement of the flux of cosmic rays with unprecedented precision and statistics using the Pierre Auger Observatory. Based on fluorescence observations in coincidence with at least one surface detector we derive a spectrum for energies above 10{sup 18} eV. We also update the previously published energy spectrum obtained with the surface detector array. The two spectra are combined addressing the systematic uncertainties and, in particular, the influence of the energy resolution on the spectral shape. The spectrum can be described by a broken power law E{sup -g}amma with index gamma=3.3 below the ankle which is measured at log{sub 10}(E{sub ankle}/eV)=18.6. Above the ankle the spectrum is described by a power law with index 2.6 followed by a flux suppression, above about log{sub 10}(E/eV)=19.5, detected with high statistical significance.}
doi = {10.1016/j.physletb.2010.02.013}
journal = []
issue = {4-5}
volume = {685}
place = {Netherlands}
year = {2010}
month = {Mar}
}