Cosmic Ray Energy Spectrum and Mass Composition from 10^15 to 10^17 eV by Data of the Tunka EAS Cherenkov Array

((1) SINP MSU; B. K. Lubsandorzhiev (3); Ch. Spiering (4); D. V. Chernov (1); E. E. Korosteleva (1); Germany); Irkutsk; I. V. Yashin (1); L. A. Kuzmichev (a); L. V. Pankov (2)

arxiv: astro-ph/0511215 · v1 · submitted 2005-11-08 · 🌌 astro-ph

Cosmic Ray Energy Spectrum and Mass Composition from 10¹5 to 10¹7 eV by Data of the Tunka EAS Cherenkov Array

N. M. Budnev (2) , D. V. Chernov (1) , O. A. Gress (2) , T. I. Gress (2) , E. E. Korosteleva (1) , L. A. Kuzmichev (a) , B. K. Lubsandorzhiev (3) , L. V. Pankov (2)

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Yu. V. Parfenov (2) V. V. Prosin (1) Yu. A. Semeney (2) Ch. Spiering (4) R. P. Wischnewski (4) I. V. Yashin (1) ((1) SINP MSU Moscow Russia (2) API ISU Irkutsk Russia (3) INR RAS Russia (4) DESY Zeuthen Germany)

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classification 🌌 astro-ph

keywords cherenkovdataenergyanalysisarraybeencompositionlight

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We present results of an improved analysis of the experimental data of the EAS Cherenkov array Tunka-25. A new function to fit the Cherenkov light lateral distribution LDF at core distances from 0 to 350 m has been developed on the base of CORSIKA simulations and applied to the analysis of Tunka data. Two methods to estimate the EAS maximum position have been used. The one is based on the pulse FWHM, the other on the light LDF. We present the primary energy spectrum in the energy range 10^15 - 10^17 eV. The use of the depth of the EAS maximum to determine the mean mass composition is discussed.

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Cosmic Ray Energy Spectrum and Mass Composition from 10¹5 to 10¹7 eV by Data of the Tunka EAS Cherenkov Array

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