Measurement of the Energy Spectrum of Cosmic Rays above $10^{18}$ eV Using the Pierre Auger Observatory

Abraham, J.

doi:10.1016/j.physletb.2010.02.013

Title: Measurement of the Energy Spectrum of Cosmic Rays above $$10^{18}$$ eV Using the Pierre Auger Observatory

Journal Article · Mon Feb 01 00:00:00 EST 2010 · Phys.Lett.B

DOI:https://doi.org/10.1016/j.physletb.2010.02.013· OSTI ID:1872091

Abraham, J.

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 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-γ with index γ=3.3 below the ankle which is measured at log10(Eankle/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 log10(E/eV)=19.5 , detected with high statistical significance.

View Journal Article

Cite

Export

Save

Research Organization:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Organization:: Pierre Auger

DOE Contract Number:: AC02-07CH11359

OSTI ID:: 1872091

Report Number(s):: FERMILAB-PUB-10-093-A; arXiv:1002.1975; oai:inspirehep.net:845562

Journal Information:: Phys.Lett.B, Vol. 685

Country of Publication:: United States

Language:: English

References (31)

Evidence for correlated changes in the spectrum and composition of cosmic rays at extremely high energies Bird, D. J.; Corbató, S. C.; Dai, H. Y. Physical Review Letters, Vol. 71, Issue 21 https://doi.org/10.1103/PhysRevLett.71.3401	journal	November 1993
The Central Laser Facility at the Pierre Auger Observatory Fick, B.; Malek, M.; Matthews, J. A. J. Journal of Instrumentation, Vol. 1, Issue 11 https://doi.org/10.1088/1748-0221/1/11/P11003	journal	November 2006
Nonlinear screening effects in high energy hadronic interactions Ostapchenko, S. Physical Review D, Vol. 74, Issue 1 https://doi.org/10.1103/PhysRevD.74.014026	journal	July 2006
At what particle energy do extragalactic cosmic rays start to predominate? Wibig, Tadeusz; Wolfendale, Arnold W. Journal of Physics G: Nuclear and Particle Physics, Vol. 31, Issue 3 https://doi.org/10.1088/0954-3899/31/3/005	journal	February 2005
The surface detector system of the Pierre Auger Observatory Allekotte, I.; Barbosa, A. F.; Bauleo, P. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 586, Issue 3 https://doi.org/10.1016/j.nima.2007.12.016	journal	March 2008
One-dimensional hybrid approach to extensive air shower simulation Bergmann, T.; Engel, R.; Heck, D. Astroparticle Physics, Vol. 26, Issue 6 https://doi.org/10.1016/j.astropartphys.2006.08.005	journal	January 2007
Dip in UHECR spectrum as signature of proton interaction with CMB Berezinsky, V.; Gazizov, A. Z.; Grigorieva, S. I. Physics Letters B, Vol. 612, Issue 3-4 https://doi.org/10.1016/j.physletb.2005.02.058	journal	April 2005
Hybrid Activities of the Pierre Auger Observatory Mostafá, Miguel Nuclear Physics B - Proceedings Supplements, Vol. 165 https://doi.org/10.1016/j.nuclphysbps.2006.11.009	journal	March 2007
An upper limit to the photon fraction in cosmic rays above 1019eV from the Pierre Auger Observatory Abraham, J.; Aglietta, M.; Aguirre, C. Astroparticle Physics, Vol. 27, Issue 2-3 https://doi.org/10.1016/j.astropartphys.2006.10.004	journal	March 2007
Upper limit on the cosmic-ray photon flux above 1019eV using the surface detector of the Pierre Auger Observatory Abraham, J.; Abreu, P.; Aglietta, M. Astroparticle Physics, Vol. 29, Issue 4 https://doi.org/10.1016/j.astropartphys.2008.01.003	journal	May 2008
Photon yields from nitrogen gas and dry air excited by electrons Nagano, M.; Kobayakawa, K.; Sakaki, N. Astroparticle Physics, Vol. 20, Issue 3 https://doi.org/10.1016/S0927-6505(03)00192-0	journal	December 2003
Measurement of the flux of ultra high energy cosmic rays by the stereo technique Abbasi, R. U.; Abu-Zayyad, T.; Al-Seady, M. Astroparticle Physics, Vol. 32, Issue 1 https://doi.org/10.1016/j.astropartphys.2009.06.001	journal	August 2009
On the re-summation of enhanced pomeron diagrams Ostapchenko, S. Physics Letters B, Vol. 636, Issue 1 https://doi.org/10.1016/j.physletb.2006.03.026	journal	April 2006
End to the Cosmic-Ray Spectrum? Greisen, Kenneth Physical Review Letters, Vol. 16, Issue 17 https://doi.org/10.1103/PhysRevLett.16.748	journal	April 1966
Determination of the calorimetric energy in extensive air showers Barbosa, H. M. J.; Catalani, F.; Chinellato, J. A. Astroparticle Physics, Vol. 22, Issue 2 https://doi.org/10.1016/j.astropartphys.2004.06.007	journal	November 2004
Capabilities of a giant hybrid air shower detector Sommers, Paul Astroparticle Physics, Vol. 3, Issue 4 https://doi.org/10.1016/0927-6505(95)00013-7	journal	August 1995
sibyll: An event generator for simulation of high energy cosmic ray cascades Fletcher, R. S.; Gaisser, T. K.; Lipari, Paolo Physical Review D, Vol. 50, Issue 9 https://doi.org/10.1103/PhysRevD.50.5710	journal	November 1994
The Lidar system of the Pierre Auger Observatory BenZvi, S. Y.; Cester, R.; Chiosso, M. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 574, Issue 1 https://doi.org/10.1016/j.nima.2007.01.094	journal	April 2007
Upper limit on the cosmic-ray photon fraction at EeV energies from the Pierre Auger Observatory Abraham, J.; Abreu, P.; Aglietta, M. Astroparticle Physics, Vol. 31, Issue 6 https://doi.org/10.1016/j.astropartphys.2009.04.003	journal	July 2009
The cosmic ray energy spectrum above 4*10 ¹⁷ eV as measured by the Haverah Park array Lawrence, M. A.; Reid, R. J. O.; Watson, A. A. Journal of Physics G: Nuclear and Particle Physics, Vol. 17, Issue 5 https://doi.org/10.1088/0954-3899/17/5/019	journal	May 1991
Limit on the diffuse flux of ultrahigh energy tau neutrinos with the surface detector of the Pierre Auger Observatory Abraham, J.; Abreu, P.; Aglietta, M. Physical Review D, Vol. 79, Issue 10 https://doi.org/10.1103/PhysRevD.79.102001	journal	May 2009
Measurement of the pressure dependence of air fluorescence emission induced by electrons Ave, M.; Bohacova, M.; Buonomo, B. Astroparticle Physics, Vol. 28, Issue 1 https://doi.org/10.1016/j.astropartphys.2007.04.006	journal	September 2007
Trigger and aperture of the surface detector array of the Pierre Auger Observatory Abraham, J.; Abreu, P.; Aglietta, M. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 613, Issue 1 https://doi.org/10.1016/j.nima.2009.11.018	journal	January 2010
The offline software framework of the Pierre Auger Observatory Argirò, S.; Barroso, S. L. C.; Gonzalez, J. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 580, Issue 3 https://doi.org/10.1016/j.nima.2007.07.010	journal	October 2007
First Observation of the Greisen-Zatsepin-Kuzmin Suppression Abbasi, R. U.; Abu-Zayyad, T.; Allen, M. Physical Review Letters, Vol. 100, Issue 10 https://doi.org/10.1103/PhysRevLett.100.101101	journal	March 2008
Properties and performance of the prototype instrument for the Pierre Auger Observatory Abraham, J.; Aglietta, M.; Aguirre, I. C. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 523, Issue 1-2 https://doi.org/10.1016/j.nima.2003.12.012	journal	May 2004
Energy spectrum of primary cosmic rays above 10 ^17.0 eV determined from extensive air shower experiments at Akeno Nagano, M.; Teshima, M.; Matsubara, Y. Journal of Physics G: Nuclear and Particle Physics, Vol. 18, Issue 2 https://doi.org/10.1088/0954-3899/18/2/022	journal	February 1992
Observation of the Suppression of the Flux of Cosmic Rays above $4 \times 10^{19} eV$ Abraham, J.; Abreu, P.; Aglietta, M. Physical Review Letters, Vol. 101, Issue 6 https://doi.org/10.1103/PhysRevLett.101.061101	journal	August 2008
Can diffusive shock acceleration in supernova remnants account for high-energy galactic cosmic rays? Hillas, A. M. Journal of Physics G: Nuclear and Particle Physics, Vol. 31, Issue 5 https://doi.org/10.1088/0954-3899/31/5/R02	journal	April 2005
Signatures of the transition from galactic to extragalactic cosmic rays Aloisio, Roberto; Berezinsky, Veniamin; Blasi, Pasquale Physical Review D, Vol. 77, Issue 2 https://doi.org/10.1103/PhysRevD.77.025007	journal	January 2008
Reconstruction of longitudinal profiles of ultra-high energy cosmic ray showers from fluorescence and Cherenkov light measurements Unger, M.; Dawson, B. R.; Engel, R. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 588, Issue 3 https://doi.org/10.1016/j.nima.2008.01.100	journal	April 2008

Similar Records

Measurement of the cosmic ray spectrum above 4 × 10{sup 18} eV using inclined events detected with the Pierre Auger Observatory

Journal Article · Sat Aug 01 00:00:00 EDT 2015 · Journal of Cosmology and Astroparticle Physics · OSTI ID:1872091

Measurement of the cosmic-ray energy spectrum above

2.5 \times 10^{18} eV

using the Pierre Auger Observatory

Journal Article · Wed Sep 16 00:00:00 EDT 2020 · Physical Review. D. · OSTI ID:1872091

Aab, A.; Abreu, P.; Aglietta, M.; +379 more

Constraining the sources of ultra-high-energy cosmic rays across and above the ankle with the spectrum and composition data measured at the Pierre Auger Observatory

Journal Article · Wed May 10 00:00:00 EDT 2023 · Journal of Cosmology and Astroparticle Physics · OSTI ID:1872091

Abdul Halim, A.; Abreu, P.; Aglietta, M.; +364 more

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS

Title: Measurement of the Energy Spectrum of Cosmic Rays above $$10^{18}$$ eV Using the Pierre Auger Observatory

Citation Formats

References (31)

Similar Records

Related Subjects