Observation of sub-PeV gamma rays from the galactic plane using the tibet air shower array with the prototype muon detector

M Amenomori ,H Lu ,Z Y Feng ,G M Le ,L Jiang ,H W Guo ,H Tsuchiya ,Zhaxisangzhu Zhaxiciren ,Masaki Nakamura ,Shoji Torii ,J Shao ,C Feng ,Ze He ,A F Li ,D Chen ,Y Q Guo ,W Y Chen ,T K Sako ,Zy Yang ,K Munakata ,C Kato ,J S Liu ,X L Qian ,S Ozawa ,J L Zhang ,J Huang ,Toshiharu Saito ,T Saito ,X R Meng ,C Liu ,H Wang ,H R Wu ,Y Yamamoto ,H M Zhang ,Dan-Zeng Dan-Zeng-Luo-Bu ,W J Li ,Z Feng ,L Labaciren ,I Ohta ,S Yasue ,H Nanjo ,M Takita ,A F Yuan ,H H He ,Y Katayose ,L M Zhai ,S W Cui ,A Shiomi ,Y H Tan ,Q B Gou ,M Shibata ,Ying Zhang ,H Sugimoto ,M Ohnishi ,Haibing Hu ,T Yuda ,N Hotta ,K Mizutani ,X J Bi ,T Shirai ,L K Ding ,X H Ding ,Y Zhang ,K Hibino ,X B Qu ,F Kajino ,K Kawata ,N Tateyama ,S Udo ,M Sakata ,X Y Zhang ,K Kasahara ,H Y Jia ,L Xue ,Yi Zhang ,X X Zhou

doi:10.7529/icrc2011/v07/0748

Abstract

We are now proposing the 10,000 m 2 water-Cherenkov-type muon detector (MD) array under the Tibet air shower (AS) array to find new gamma-ray sources with a wide field of view and unprecedented flux sensitivity. In the late fall of 2007, a prototype MD in area of 100 m 2 was constructed under the existing Tibet AS array. In this paper, we search for sub-PeV ( > 200TeV) diffuse/point-like gamma rays from the Galactic plane using the muon-poor air shower events observed by the Tibet AS array and the Prototype MD.

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