Prof. Vasily Prosin (Skobeltsyn Institute of Nuclear Physics of Lomonosov Moscow State University)
The improved methods of EAS parameters reconstruction in Tunka-133 suitable both for the internal and external shower core position are described. The methods are used for the analysis of data collected during three winter seasons from 2009 till 2012. The primary CR energy spectrum in the range 10^15 – 10^18 eV is presented. The variation of X_max distribution parameters with energy and corresponding variation of the primary mass composition are discussed.