Browsing by Autor "N. Gironda"

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    A small air-shower array at Mount Chacaltaya
    (Elsevier BV, 1996) F. Kakimoto; S. Ogio; Y. Shirasaki; N. Gironda; T. Kaneko; H. Yoshii; Toshihiko Baba; K. Nishi; N. Tajima; Y. Yamada
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    Chemical composition of primary cosmic rays with energies from 1015 to 1016.5 eV
    (Elsevier BV, 2001) Y. Shirasaki; F. Kakimoto; S. Ogio; N. Gironda; M. Takeda; T. Kaneko; H. Yoshii; Toshihiko Baba; Sakae Sano; K. Nishi
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    Searches for Ultra–High‐Energy Gamma Rays from SN 1987A and Centaurus X‐3
    (IOP Publishing, 1996) H. Yoshii; T. Baba; T. Kaneko; K. Suga; F. Kakimoto; S. Ogio; Y. Shirasaki; N. Gironda; M. Teshima; Y. Toyoda
    Searches for gamma rays above 100 TeV from SN 1987A and above 50 TeV from Cen X-3 were carried out with an air shower array at Mount Chacaltaya over a period of 3 years. The array, which consists of 13 4 m2 and 28 1 m2 scintillation detectors, was located on a slope of about 30 facing southward to e ectively observe air showers coming from the directions of these sources. In the analysis, a selection by shower age parameter was applied to reduce the background due to showers initiated by protons or nuclei.