OBSERVATION OF TeV GAMMA RAYS FROM THE FERMI BRIGHT GALACTIC SOURCES WITH THE TIBET AIR SHOWER ARRAY
OBSERVATION OF TeV GAMMA RAYS FROM THE FERMI BRIGHT GALACTIC SOURCES WITH THE TIBET AIR SHOWER ARRAY
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DOI：
10.1088/2041-8205/709/1/l6
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发表时间：
2009-12
期刊：
影响因子：
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通讯作者：
M. Amenomori;X. Bi;D. Chen;S. Cui;Danzengluobu;L. Ding;X. Ding;C. Fan;C. Feng;Zhaoyang Feng;Z. Feng;Xiang Gao;Q. Geng;Q. Gou;H. Guo;H. He;M. He;K. Hibino;N. Hotta;Haibing Hu;H. Hu;J. Huang;Q. Huang;H. Jia;L. Jiang;F. Kajino;K. Kasahara;Y. Katayose;C. Kato;K. Kawata;Labaciren;G. Le;A. Li;H. C. Li;J. Li;C. Liu;Y. Lou;H. Lu;X. Meng;K. Mizutani;J. Mu;K. Munakata;H. Nanjo;M. Nishizawa;M. Ohnishi;I. Ohta;S. Ozawa;T. Saito;T. Saito;M. Sakata;T. Sako;M. Shibata;A. Shiomi;T. Shirai;H. Sugimoto;M. Takita;Y. Tan;N. Tateyama;S. Torii;H. Tsuchiya;S. Udo;B. Wang;Hong Wang;Y. Wang;Y. Wang;H. Wu;L. Xue;Y. Yamamoto;C. Yan;X. Yang;S. Yasue;Z. Ye;G. Yu;A. Yuan;T. Yuda;H. Zhang;J. Zhang;N. Zhang;X. Zhang;Y. Zhang;Yi. Zhang;Ying Zhang;Zhaxisangzhu;A. X. Zhou
中科院分区：
文献类型：
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作者：
M. Amenomori;X. Bi;D. Chen;S. Cui;Danzengluobu;L. Ding;X. Ding;C. Fan;C. Feng;Zhaoyang Feng;Z. Feng;Xiang Gao;Q. Geng;Q. Gou;H. Guo;H. He;M. He;K. Hibino;N. Hotta;Haibing Hu;H. Hu;J. Huang;Q. Huang;H. Jia;L. Jiang;F. Kajino;K. Kasahara;Y. Katayose;C. Kato;K. Kawata;Labaciren;G. Le;A. Li;H. C. Li;J. Li;C. Liu;Y. Lou;H. Lu;X. Meng;K. Mizutani;J. Mu;K. Munakata;H. Nanjo;M. Nishizawa;M. Ohnishi;I. Ohta;S. Ozawa;T. Saito;T. Saito;M. Sakata;T. Sako;M. Shibata;A. Shiomi;T. Shirai;H. Sugimoto;M. Takita;Y. Tan;N. Tateyama;S. Torii;H. Tsuchiya;S. Udo;B. Wang;Hong Wang;Y. Wang;Y. Wang;H. Wu;L. Xue;Y. Yamamoto;C. Yan;X. Yang;S. Yasue;Z. Ye;G. Yu;A. Yuan;T. Yuda;H. Zhang;J. Zhang;N. Zhang;X. Zhang;Y. Zhang;Yi. Zhang;Ying Zhang;Zhaxisangzhu;A. X. Zhou
利用西藏三号空气簇射阵列，我们在费米大面积望远镜获得的能量超过100MeV的早期亮源名单中，寻找了来自27个潜在银河系源的TeVγ射线。其中，我们观察到7个源，而不是预期的0.61个源，其显著超过2σ或更多。泊松统计的几率估计为3.8×10−6。如果西藏三号阵列观测到的超额分布有一个朝向银河系平面的密度梯度，则可以在几率关联中增加预期的源数。然后，基于简单的蒙特卡罗模拟，几率略有上升，达到1.2x10−5。这些低几率清楚地表明，费米亮星系源与TeVγ射线过剩在统计上有显著的相关性。我们还发现，所有七个源都与脉冲星有关，其中六个与米拉格罗实验在35TeV代表能量下探测到的3σ或更大意义的源重合。西藏三号空气簇射阵列在费米源周围观测到的显著图与米拉格罗⩾3σ源一致，与米拉格罗观测结果一致。这是对TeV地区的费米明亮星系源进行的北天调查的第一个结果。
Using the Tibet-III air shower array, we search for TeV γ-rays from 27 potential Galactic sources in the early list of bright sources obtained by the Fermi Large Area Telescope at energies above 100 MeV. Among them, we observe seven sources instead of the expected 0.61 sources at a significance of 2σ or more excess. The chance probability from Poisson statistics would be estimated to be 3.8 × 10−6. If the excess distribution observed by the Tibet-III array has a density gradient toward the Galactic plane, the expected number of sources may be enhanced in chance association. Then, the chance probability rises slightly, to 1.2 × 10−5, based on a simple Monte Carlo simulation. These low chance probabilities clearly show that the Fermi bright Galactic sources have statistically significant correlations with TeV γ-ray excesses. We also find that all seven sources are associated with pulsars, and six of them are coincident with sources detected by the Milagro experiment at a significance of 3σ or more at the representative energy of 35 TeV. The significance maps observed by the Tibet-III air shower array around the Fermi sources, which are coincident with the Milagro ⩾3σ sources, are consistent with the Milagro observations. This is the first result of the northern sky survey of the Fermi bright Galactic sources in the TeV region.