Measurement of the flux of ultrahigh energy cosmic rays from monocular observations by the High Resolution Fly's Eye experiment

R U Abbasi; T Abu-Zayyad; J F Amann; G Archbold; J A Bellido; K Belov; J W Belz; D R Bergman; Z Cao; R W Clay; M D Cooper; H Dai; B R Dawson; A A Everett; Yu A Fedorova; J H V Girard; R C Gray; W F Hanlon; C M Hoffman; M H Holzscheiter; P Hüntemeyer; B F Jones; C C H Jui; D B Kieda; K Kim; M A Kirn; E C Loh; N Manago; L J Marek; K Martens; G Martin; J A J Matthews; J N Matthews; J R Meyer; S A Moore; P Morrison; A N Moosman; J R Mumford; M W Munro; C A Painter; L Perera; K Reil; R Riehle; M Roberts; J S Sarracino; M Sasaki; S R Schnetzer; P Shen; K M Simpson; G Sinnis; J D Smith; P Sokolsky; C Song; R W Springer; B T Stokes; S F Taylor; S B Thomas; T N Thompson; G B Thomson; D Tupa; S Westerhoff; L R Wiencke; T D VanderVeen; A Zech; X Zhang; High Resolution Fly's Eye Collaboration

doi:10.1103/PhysRevLett.92.151101

Measurement of the flux of ultrahigh energy cosmic rays from monocular observations by the High Resolution Fly's Eye experiment

Phys Rev Lett. 2004 Apr 16;92(15):151101. doi: 10.1103/PhysRevLett.92.151101. Epub 2004 Apr 15.

Authors

R U Abbasi¹, T Abu-Zayyad, J F Amann, G Archbold, J A Bellido, K Belov, J W Belz, D R Bergman, Z Cao, R W Clay, M D Cooper, H Dai, B R Dawson, A A Everett, Yu A Fedorova, J H V Girard, R C Gray, W F Hanlon, C M Hoffman, M H Holzscheiter, P Hüntemeyer, B F Jones, C C H Jui, D B Kieda, K Kim, M A Kirn, E C Loh, N Manago, L J Marek, K Martens, G Martin, J A J Matthews, J N Matthews, J R Meyer, S A Moore, P Morrison, A N Moosman, J R Mumford, M W Munro, C A Painter, L Perera, K Reil, R Riehle, M Roberts, J S Sarracino, M Sasaki, S R Schnetzer, P Shen, K M Simpson, G Sinnis, J D Smith, P Sokolsky, C Song, R W Springer, B T Stokes, S F Taylor, S B Thomas, T N Thompson, G B Thomson, D Tupa, S Westerhoff, L R Wiencke, T D VanderVeen, A Zech, X Zhang; High Resolution Fly's Eye Collaboration

Affiliation

¹ Department of Physics and High Energy Astrophysics Institute, University of Utah, Salt Lake City, Utah 84112, USA.

PMID: 15169276
DOI: 10.1103/PhysRevLett.92.151101

Abstract

We have measured the cosmic ray spectrum above 10(17.2) eV using the two air-fluorescence detectors of the High Resolution Fly's Eye observatory operating in monocular mode. We describe the detector, phototube, and atmospheric calibrations, as well as the analysis techniques for the two detectors. We fit the spectrum to a model consisting of galactic and extragalactic sources.