Multi-TeV Gamma-Ray Flares from Markarian 421 in 2000 and 2001 Observed with the Tibet Air Shower Array

Multi-TeV Gamma-Ray Flares from Markarian 421 in 2000 and 2001 Observed with the Tibet Air Shower Array
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DOI：
10.1086/378350
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发表时间：
2003-04
期刊：
The Astrophysical Journal
影响因子：
--
通讯作者：
M. Amenomori;S. Ayabe;S. Cui;Danzengluobu;L. Ding;X. Ding;C. Feng;Z. Feng;Xiang Gao;Q. Geng;H. Guo;H. He;M. He;K. Hibino;N. Hotta;Haibing Hu;H. Hu;J. Huang;Q. Huang;H. Jia;F. Kajino;K. Kasahara;Y. Katayose;K. Kawata;Labaciren;G. Le;J. Li;H. Lu;S. L. Lu;X. Meng;K. Mizutani;J. Mu;H. Nanjo;M. Nishizawa;M. Ohnishi;I. Ohta;T. Ouchi;S. Ozawa;Jie Ren;T. Saito;M. Sakata;T. Sasaki;M. Shibata;A. Shiomi;T. Shirai;H. Sugimoto;K. Taira;M. Takita;Y. Tan;N. Tateyama;S. Torii;H. Tsuchiya;S. Udo;T. Utsugi;B. Wang;Hong Wang;X. Wang;Y. Wang;L. Xue;Y. Yamamoto;X. Yang;Z. Ye;G. Yu;A. Yuan;T. Yuda;H. Zhang;J. Zhang;N. Zhang;X. Zhang;Yizhe Zhang;Zhaxisangzhu;X. Zhou
M. Amenomori;S. Ayabe;S. Cui;Danzengluobu;L. Ding;X. Ding;C. Feng;Z. Feng;Xiang Gao;Q. Geng;H. Guo;H. He;M. He;K. Hibino;N. Hotta;Haibing Hu;H. Hu;J. Huang;Q. Huang;H. Jia;F. Kajino;K. Kasahara;Y. Katayose;K. Kawata;Labaciren;G. Le;J. Li;H. Lu;S. L. Lu;X. Meng;K. Mizutani;J. Mu;H. Nanjo;M. Nishizawa;M. Ohnishi;I. Ohta;T. Ouchi;S. Ozawa;Jie Ren;T. Saito;M. Sakata;T. Sasaki;M. Shibata;A. Shiomi;T. Shirai;H. Sugimoto;K. Taira;M. Takita;Y. Tan;N. Tateyama;S. Torii;H. Tsuchiya;S. Udo;T. Utsugi;B. Wang;Hong Wang;X. Wang;Y. Wang;L. Xue;Y. Yamamoto;X. Yang;Z. Ye;G. Yu;A. Yuan;T. Yuda;H. Zhang;J. Zhang;N. Zhang;X. Zhang;Yizhe Zhang;Zhaxisangzhu;X. Zhou
中科院分区：
其他
文献类型：
--
作者：
M. Amenomori;S. Ayabe;S. Cui;Danzengluobu;L. Ding;X. Ding;C. Feng;Z. Feng;Xiang Gao;Q. Geng;H. Guo;H. He;M. He;K. Hibino;N. Hotta;Haibing Hu;H. Hu;J. Huang;Q. Huang;H. Jia;F. Kajino;K. Kasahara;Y. Katayose;K. Kawata;Labaciren;G. Le;J. Li;H. Lu;S. L. Lu;X. Meng;K. Mizutani;J. Mu;H. Nanjo;M. Nishizawa;M. Ohnishi;I. Ohta;T. Ouchi;S. Ozawa;Jie Ren;T. Saito;M. Sakata;T. Sasaki;M. Shibata;A. Shiomi;T. Shirai;H. Sugimoto;K. Taira;M. Takita;Y. Tan;N. Tateyama;S. Torii;H. Tsuchiya;S. Udo;T. Utsugi;B. Wang;Hong Wang;X. Wang;Y. Wang;L. Xue;Y. Yamamoto;X. Yang;Z. Ye;G. Yu;A. Yuan;T. Yuda;H. Zhang;J. Zhang;N. Zhang;X. Zhang;Yizhe Zhang;Zhaxisangzhu;X. Zhou

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2000年和2001年，西藏III空气簇射阵列在MERK421上观测到了几个TeVγ强耀斑，其统计意义为5.1σ。在此期间，MRK421在X射线和TeVγ射线能量上表现出前所未有的活跃，并且发现全天监测仪ROSSI X射线定时探测器X射线通量的变化与西藏TeVγ射线通量之间存在正相关关系。当假定该源的γ射线为幂函数能谱时，计算出2001年最活跃时的能谱指数为-3.24±0.69。西藏空气簇射阵列观测到的光谱指数与空气切伦科夫望远镜成像得到的光谱指数是一致的。
Several strong TeV γ-ray flares were detected from Mrk 421 in the years 2000 and 2001 by the Tibet III air shower array at a level of statistical significance of 5.1 σ. Mrk 421 was unprecedentedly active at X-ray and TeV γ-ray energies during this period, and a positive correlation was found between the change of the all-sky monitor Rossi X-Ray Timing Explorer X-ray flux and the Tibet TeV γ-ray flux. When a power-law energy spectrum for γ-rays from this source is assumed, the spectral index is calculated to be -3.24 ± 0.69 at the most active phase in 2001. The spectral index observed by the Tibet air shower array is consistent with those obtained via imaging air Cerenkov telescopes.