TeV Gamma Ray Survey on the Direction of Fermi-LAT Pulsars with the Tibet Air Shower Array

M. Amenomori,X. J. Bi,D. Chen,S. W. Cui, Danzengluobu,L. K. Ding,X. H. Ding,C. Fan,C. F. Feng,Zhaoyang Feng,Z. Y. Feng,X. Y. Gao,Q. X. Geng,Q. B. Gou,H. W. Guo,H. H. He,M. He,K. Hibino,N. Hotta,Haibing Hu,H. B. Hu, J. Huang,Q. Huang,H. Y. Jia,L. Jiang,F. Kajino,K. Kasahara,Y. Katayose,C. Kato,K. Kawata,Labaciren,G. M. Le,A. F. Li,H. C. Li,J. Y. Li,C. Liu,Y.-Q. Lou,H. Lu,X. R. Meng,K. Mizutani,J. Mu,K. Munakata,H. Nanjo,M. Nishizawa,M. Ohnishi,I. Ohta,S. Ozawa,T. Saito,T. Y. Saito,M. Sakata,T. K. Sako,M. Shibata,A. Shiomi,T. Shirai,H. Sugimoto,M. Takita,Y. H. Tan, N. Tateyama,S. Torii,H. Tsuchiya,S. Udo,B. Wang,H. Wang,Y. Wang,Y. G. Wang,H. R. Wu,L. Xue,Y. Yamamoto,C. T. Yan,X. C. Yang,S. Yasue,Z. H. Ye,G. C. Yu,A. F. Yuan,T. Yuda,H. M. Zhang,J. L. Zhang,N. J. Zhang,X. Y. Zhang,Y. Zhang, Yi Zhang,Ying Zhang, Zhaxisangzhu,X. X. Zhou,The Tibet ASγ Collaboration

High-Energy Emission from Pulsars and their SystemsAstrophysics and Space Science Proceedings（2011）

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摘要

We search for steady TeV γ-rays from 18 pulsars in the Fermi-LAT pulsar catalog using the Tibet air shower array. We observe 8 sources including the Crab against expected 0.41 sources at a significance of 2σ or more among the 18 pulsars. The chance probability from Poisson statistics is estimated to be 1.4×10-8.With the Crab excluded, it is estimated to be 1.8×10-7. These low chance probabilities clearly show that the Fermi pulsars have a statistically significant correlation with TeV γ-ray excesses observed by the Tibet air shower array.

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关键词

Crab Nebula, Large Area Telescope, Cherenkov Telescope, Chance Probability, Galactic Source

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