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

被引：67

作者：

Amenomori, M ^{[1
]}

Ayabe, S

Cui, SW

Danzengluobu

Ding, LK

Ding, XH

Feng, CF

Feng, ZY

Gao, XY

Geng, QX

Guo, HW

He, HH

He, M

Hibino, K

Hotta, N

Hu, HB

Huang, J

Huang, Q

Jia, HY

Kajino, F

Kasahara, K

Katayose, Y

Kawata, K

Labaciren

Le, GM

Li, JY

Lu, H

Lu, SL

Meng, XR

Mizutani, K

Mu, J

Nanjo, H

Nishizawa, M

Ohnishi, M

Ohta, I

Ouchi, T

Ozawa, S

Ren, JR

Saito, T

Sakata, M

Sasaki, T

Shibata, M

Shiomi, A

Shirai, T

Sugimoto, H

Taira, K

Takita, M

Tan, YH

Tateyama, N

机构：

[1] Hirosaki Univ, Dept Phys, Hirosaki, Aomori 0368561, Japan

[2] Saitama Univ, Dept Phys, Saitama 3388570, Japan

[3] Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China

[4] Tibet Univ, Dept Math & Phys, Lhasa 850000, Peoples R China

[5] Shandong Univ, Dept Phys, Jinan 250100, Peoples R China

[6] SW Jiaotong Univ, Inst Modern Phys, Chengdu 610031, Peoples R China

[7] Yunnan Univ, Dept Phys, Kunming 650091, Peoples R China

[8] Kanagawa Univ, Fac Engn, Yokohama, Kanagawa 2218686, Japan

[9] Utsunomiya Univ, Fac Educ, Utsunomiya, Tochigi 3218505, Japan

[10] Konan Univ, Dept Phys, Kobe, Hyogo 6588501, Japan

[11] Shibaura Inst Technol, Fac Syst Engn, Saitama 3308570, Japan

[12] Yokohama Natl Univ, Fac Engn, Yokohama, Kanagawa 2408501, Japan

[13] Chinese Acad Sci, Ctr Space Sci & Applicat Res, Beijing 100080, Peoples R China

[14] Natl Inst Informat, Tokyo 1018430, Japan

[15] Univ Tokyo, Inst Cosm Ray Res, Kashiwa, Chiba 2778582, Japan

[16] Tokyo Metropolitan Coll Aeronaut Engn, Tokyo 1160003, Japan

[17] Shonan Inst Technol, Fujisawa, Kanagawa 2518511, Japan

[18] Nagoya Univ, Solar Terr Environm Lab, Nagoya, Aichi 4648601, Japan

来源：

ASTROPHYSICAL JOURNAL | 2003年 / 598卷 / 01期

关键词：

BL Lacertae objects : individual (Markarian 421); gamma rays : observations;

D O I：

10.1086/378350

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Several strong TeV gamma-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 sigma. Mrk 421 was unprecedentedly active at X-ray and TeV gamma-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 gamma-ray flux. When a power-law energy spectrum for gamma-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.

引用

页码：242 / 249

页数：8

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