Multi-TeV gamma-ray flares from Markarian 421 in 2000 and 2001 observed with the Tibet air shower array

M. Amenomori*, S. Ayabe, S. W. Cui, Danzenoluobu, L. K. Ding, X. H. Ding, C. F. Feng, Z. Y. Feng, X. Y. Gao, Q. X. Geng, H. W. Guo, H. H. He, M. He, K. Hibino, N. Hotta, Hu Haibing, H. B. Hu, J. Huang, Q. Huang, H. Y. JiaF. Kajino, K. Kasahara, Y. Katayose, K. Kawata, Labaciren, G. M. Le, J. Y. Li, H. Lu, S. L. Lu, X. R. Meng, K. Mizutani, J. Mu, H. Nanjo, M. Nishizawa, M. Ohnishi, I. Ohta, T. Ouchi, Shunsuke Ozawa, J. R. Ren, T. Saito, M. Sakata, T. Sasaki, M. Shibata, A. Shiomi, T. Shirai, H. Sugimoto, K. Taira, M. Takita, Y. H. Tan, N. Tateyama, Shoji Torii, H. Tsuchiya, S. Udo, T. Utsugi, B. S. Wang, H. Wang, X. Wang, Y. G. Wang, L. Xue, Y. Yamamoto, X. C. Yang, 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, Zhaxisangzhu, X. X. Zhou

*この研究の対応する著者

研究成果: Article査読

76 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)242-249
ページ数8
ジャーナルAstrophysical Journal
598
1 I
DOI
出版ステータスPublished - 2003 11月 20
外部発表はい

ASJC Scopus subject areas

  • 宇宙惑星科学

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