Observation of the ankle and evidence for a high-energy break in the cosmic ray spectrum

Abbasi, R.; Abu-Zayyad, T.; Amman, J.; Archbold, G.; Atkins, R.; Bellido Caceres, J.; Belov, K.; Belz, J.; BenZvi, S.; Bergman, D.; Burt, G.; Cao, Z.; Clay, R.; Connolly, B.; Deng, W.; Dawson, B.; Fedorova, Y.; Findlay, J.; Finley, C.; Hanlon, W.; et al.

Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/17877

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Type:	Journal article
Title:	Observation of the ankle and evidence for a high-energy break in the cosmic ray spectrum
Author:	Abbasi, R. Abu-Zayyad, T. Amman, J. Archbold, G. Atkins, R. Bellido Caceres, J. Belov, K. Belz, J. BenZvi, S. Bergman, D. Burt, G. Cao, Z. Clay, R. Connolly, B. Deng, W. Dawson, B. Fedorova, Y. Findlay, J. Finley, C. Hanlon, W. et al.
Citation:	Physics Letters B: Nuclear Physics and Particle Physics, 2005; 619(3-4):271-280
Publisher:	Elsevier Science BV
Issue Date:	2005
ISSN:	0370-2693 1873-2445
Statement of Responsibility:	R.U. Abbasi, T. Abu-Zayyad, J.F. Amman, G. Archbold, R. Atkins, J.A. Bellido, K. Belov, J.W. Belz, S.Y. Ben Zvi, D.R. Bergman, G.W. Burt, Z. Cao, R.W. Clay, B.C. Connolly, W. Deng, B.R. Dawson, Y. Fedorova, J. Findlay, C.B. Finley, W.F. Hanlon, C.M. Hoffman, G.A. Hughes, M.H. Holzscheiter, P. Hüntemeyer, C.C.H. Jui, K. Kim, M.A. Kirn, E.G. Loh, M.M. Maestas, N. Manago, L.J. Marek, K. Martens, J.A.J. Matthews, J.N. Matthews, A. O’Neill, C.A. Painter, L. Perera, K. Reil, R. Riehle, M. Roberts, M. Sasaki, S.R. Schnetzer, K.M. Simpson, G. Sinnis, J.D. Smith, R. Snow, P. Sokolsky, C. Song, R.W. Springer, B.T. Stokes, J.R. Thomas, S.B. Thomas, G.B. Thomson, D. Tupa, S. Westerhoff, L.R. Wiencke, and A. Zech
Abstract:	We have measured the cosmic ray spectrum at energies above 1017eV using the two air fluorescence detectors of the High Resolution Fly's Eye experiment operating in monocular mode. We describe the detector, PMT and atmospheric calibrations, and the analysis techniques for the two detectors. We fit the spectrum to models describing galactic and extragalactic sources. Our measured spectrum gives an observation of a feature known as the "ankle" near 3×1018eV, and strong evidence for a suppression near 6×1019eV. © 2005 Elsevier B.V. All rights reserved.
DOI:	10.1016/j.physletb.2005.05.064
Description (link):	http://www.elsevier.com/wps/find/journaldescription.cws_home/505706/description#description
Published version:	http://dx.doi.org/10.1016/j.physletb.2005.05.064
Appears in Collections:	Aurora harvest 2 Physics publications

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