Author/Authors :
Kakimoto، نويسنده , , F. and Ogio، نويسنده , , S. and Shirasaki، نويسنده , , Y. and Gironda، نويسنده , , N. and Kaneko، نويسنده , , T. and Yoshii، نويسنده , , H. A. Baba، نويسنده , , T. and Nishi، نويسنده , , Tadasu K. and Tajima، نويسنده , , N. and Yamada، نويسنده , , Y. and Shimoda، نويسنده , , S. and Nakatani، نويسنده , , H. and Gotoh، نويسنده , , William E. and Toyoda، نويسنده , , Y. and Murakami، نويسنده , , K. and Matsubara، نويسنده , , Y. and Mizumot، نويسنده ,
Abstract :
We have operated a small air-shower array at Mount Chacaltaya in Bolivia since September 1987 and have observed air showers with primary energies above 2.0 × 1013 eV. This array consists of thirty-three unshielded scintillation detectors and a shielded scintillation detector. The unshielded detectors are installed over an almost flat field of approximately 8 × 103m2 area, while the shielded detector is located at the array center. In the present paper, we report both the details and the operation of this array and the analysis method for the observed data. Furthermore, we have simulated air showers with a Monte Carlo technique. Then, analyzing these air showers, we examine the performance of our array, that is, the accuracy in determination of the electron sizes and the arrival directions of observed air showers.
