Speaker
Kazumasa Kawata
(ICRR, University of Tokyo)
Description
More than 100 gamma-ray sources have been detected by the Cherenkov telescopes in the energies from sub-TeV to multi-TeV. On the other hand, the extensive air shower (EAS) arrays, such as the Tibet air shower array, the ARGO-YBJ and the Milagro, have observed several gamma-ray sources with the wide field of view and higher energy threshold than the Cherenkov telescopes.
Aiming at 100 TeV gamma-ray astronomy, the Tibet water-Cherenkov-type muon detector (MD) array ($\sim$4000m$^2$) was constructed under the Tibet air shower (AS) array ($\sim$37000m$^2$), and the data taking was started in 2014. This AS+MD array will significantly improve gamma-ray sensitivity in 10-1000 TeV region by means of gamma/hadron separation based on counting the number of muons accompanying an air shower.
In this work, performance of the Tibet AS+MD array will be investigated by the detailed MC simulations. We will mainly study the energy determination of gamma-ray-induced air showers in the 10-1000 TeV energy region using the lateral distribution of EAS assuming the Tibet AS+MD array. We will also show possibility of selecting gamma-ray showers from the hadron backgrounds by the age parameter of the lateral distribution.
| Registration number following "ICRC2015-I/" | 0107 |
|---|---|
| Collaboration | -- not specified -- |
Author
Kazumasa Kawata
(ICRR, University of Tokyo)
Co-authors
Masato Takita
(Univ. of Tokyo)
Munehiro Ohnishi
(Univ. of Tokyo)
Dr
Takashi SAKO
(Institute for Cosmic Ray Research, University of Tokyo)
