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The cosmic-ray energy spectrum observed with the surface detector of the telescope array experiment

Title
The cosmic-ray energy spectrum observed with the surface detector of the telescope array experiment
Authors
Abu-Zayyad T.Aida R.Allen M.Anderson R.Azuma R.Barcikowski E.Belz J.W.Bergman D.R.Blake S.A.Cady R.Cheon B.G.Chiba J.Chikawa M.Cho E.J.Cho W.R.Fujii H.Fujii T.Fukuda T.Fukushima M.Hanlon W.Hayashi K.Hayashi Y.Hayashida N.Hibino K.Hiyama K.Honda K.Iguchi T.Ikeda D.Ikuta K.Inoue N.Ishii T.Ishimori R.Ivanov D.Iwamoto S.Jui C.C.H.Kadota K.Kakimoto F.Kalashev O.Kanbe T.Kasahara K.Kawai H.Kawakami S.Kawana S.Kido E.Kim H.B.Kim H.K.Kim J.H.Kitamoto K.Kitamura S.Kitamura Y.Kobayashi K.Kobayashi Y.Kondo Y.Kuramoto K.Kuzmin V.Kwon Y.J.Lan J.Lim S.I.Machida S.Martens K.Matsuda T.Matsuura T.Matsuyama T.Matthews J.N.Minamino M.Miyata K.Murano Y.Myers I.Nagasawa K.Nagataki S.Nakamura T.Nam S.W.Nonaka T.Ogio S.Ohnishi M.Ohoka H.Oki K.Oku D.Okuda T.Oshima A.Ozawa S.Park I.H.Pshirkov M.S.Rodriguez D.C.Roh S.Y.Rubtsov G.Ryu D.Sagawa H.Sakurai N.Sampson A.L.Scott L.M.Shah P.D.Shibata F.Shibata T.Shimodaira H.Shin B.K.Shin J.I.Shirahama T.Smith J.D.Sokolsky P.Stokes B.T.Stratton S.R.Stroman T.Suzuki S.Takahashi Y.Takeda M.Taketa A.Takita M.Tameda Y.Tanaka H.Tanaka K.Tanaka M.Thomas S.B.Thomson G.B.Tinyakov P.Tkachev I.Tokuno H.Tomida T.Troitsky S.Tsunesada Y.Tsutsumi K.Tsuyuguchi Y.Uchihori Y.Udo S.Ukai H.Vasiloff G.Wada Y.Wong T.Wood M.Yamakawa Y.Yamane R.Yamaoka H.Yamazaki K.Yang J.Yoneda Y.Yoshida S.Yoshii H.Zhou X.Zollinger R.Zundel Z.
Ewha Authors
양종만박일흥남신우
SCOPUS Author ID
양종만scopus
Issue Date
2013
Journal Title
Astrophysical Journal Letters
ISSN
2041-8205JCR Link
Citation
vol. 768, no. 1
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The Telescope Array (TA) collaboration has measured the energy spectrum of ultra-high energy cosmic rays (UHECRs) with primary energies above 1.6 × 1018 eV. This measurement is based upon four years of observation by the surface detector component of TA. The spectrum shows a dip at an energy of 4.6 × 1018 eV and a steepening at 5.4 × 1019 eV which is consistent with the expectation from the GZK cutoff. We present the results of a technique, new to the analysis of UHECR surface detector data, that involves generating a complete simulation of UHECRs striking the TA surface detector. The procedure starts with shower simulations using the CORSIKA Monte Carlo program where we have solved the problems caused by use of the "thinning" approximation. This simulation method allows us to make an accurate calculation of the acceptance of the detector for the energies concerned. © 2013. The American Astronomical Society. All rights reserved.
DOI
10.1088/2041-8205/768/1/L1
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자연과학대학 > 물리학전공 > Journal papers
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