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. Jia; F. 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

doi:10.1086/378350

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

^*Corresponding author for this work

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Abstract

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.

Original language	English
Pages (from-to)	242-249
Number of pages	8
Journal	Astrophysical Journal
Volume	598
Issue number	1 I
DOIs	https://doi.org/10.1086/378350
Publication status	Published - 2003 Nov 20
Externally published	Yes

Keywords

BL Lacertae objects: individual (Markarian 421)
Gamma rays: observations

ASJC Scopus subject areas

Space and Planetary Science

Access to Document

10.1086/378350

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Amenomori, M., Ayabe, S., Cui, S. W., Danzenoluobu, Ding, L. K., Ding, X. H., Feng, C. F., Feng, Z. Y., Gao, X. Y., Geng, Q. X., Guo, H. W., He, H. H., He, M., Hibino, K., Hotta, N., Haibing, H., Hu, H. B., Huang, J., Huang, Q., ... Zhou, X. X. (2003). Multi-TeV gamma-ray flares from Markarian 421 in 2000 and 2001 observed with the Tibet air shower array. Astrophysical Journal, 598(1 I), 242-249. https://doi.org/10.1086/378350

Amenomori, M, Ayabe, S, Cui, SW, Danzenoluobu, Ding, LK, Ding, XH, Feng, CF, Feng, ZY, Gao, XY, Geng, QX, Guo, HW, He, HH, He, M, Hibino, K, Hotta, N, Haibing, H, 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, Torii, S, Tsuchiya, H, Udo, S, Utsugi, T, Wang, BS, Wang, H, Wang, X, Wang, YG, Xue, L, Yamamoto, Y, Yang, XC, Ye, ZH, Yu, GC, Yuan, AF, Yuda, T, Zhang, HM, Zhang, JL, Zhang, NJ, Zhang, XY, Zhang, Y, Zhaxisangzhu & Zhou, XX 2003, 'Multi-TeV gamma-ray flares from Markarian 421 in 2000 and 2001 observed with the Tibet air shower array', Astrophysical Journal, vol. 598, no. 1 I, pp. 242-249. https://doi.org/10.1086/378350

@article{9280bfbd35ab4830824751ac5798a067,

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

abstract = "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.",

keywords = "BL Lacertae objects: individual (Markarian 421), Gamma rays: observations",

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

year = "2003",

month = nov,

day = "20",

doi = "10.1086/378350",

language = "English",

volume = "598",

pages = "242--249",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "1 I",

}

TY - JOUR

T1 - Multi-TeV gamma-ray flares from Markarian 421 in 2000 and 2001 observed with the Tibet air shower array

AU - Amenomori, M.

AU - Ayabe, S.

AU - Cui, S. W.

AU - Danzenoluobu,

AU - Ding, L. K.

AU - Ding, X. H.

AU - Feng, C. F.

AU - Feng, Z. Y.

AU - Gao, X. Y.

AU - Geng, Q. X.

AU - Guo, H. W.

AU - He, H. H.

AU - He, M.

AU - Hibino, K.

AU - Hotta, N.

AU - Haibing, Hu

AU - Hu, H. B.

AU - Huang, J.

AU - Huang, Q.

AU - Jia, H. Y.

AU - Kajino, F.

AU - Kasahara, K.

AU - Katayose, Y.

AU - Kawata, K.

AU - Labaciren,

AU - Le, G. M.

AU - Li, J. Y.

AU - Lu, H.

AU - Lu, S. L.

AU - Meng, X. R.

AU - Mizutani, K.

AU - Mu, J.

AU - Nanjo, H.

AU - Nishizawa, M.

AU - Ohnishi, M.

AU - Ohta, I.

AU - Ouchi, T.

AU - Ozawa, Shunsuke

AU - Ren, J. R.

AU - Saito, T.

AU - Sakata, M.

AU - Sasaki, T.

AU - Shibata, M.

AU - Shiomi, A.

AU - Shirai, T.

AU - Sugimoto, H.

AU - Taira, K.

AU - Takita, M.

AU - Tan, Y. H.

AU - Tateyama, N.

AU - Torii, Shoji

AU - Tsuchiya, H.

AU - Udo, S.

AU - Utsugi, T.

AU - Wang, B. S.

AU - Wang, H.

AU - Wang, X.

AU - Wang, Y. G.

AU - Xue, L.

AU - Yamamoto, Y.

AU - Yang, X. C.

AU - Ye, Z. H.

AU - Yu, G. C.

AU - Yuan, A. F.

AU - Yuda, T.

AU - Zhang, H. M.

AU - Zhang, J. L.

AU - Zhang, N. J.

AU - Zhang, X. Y.

AU - Zhang, Y.

AU - Zhaxisangzhu,

AU - Zhou, X. X.

PY - 2003/11/20

Y1 - 2003/11/20

N2 - 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.

AB - 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.

KW - BL Lacertae objects: individual (Markarian 421)

KW - Gamma rays: observations

UR - http://www.scopus.com/inward/record.url?scp=0346896460&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0346896460&partnerID=8YFLogxK

U2 - 10.1086/378350

DO - 10.1086/378350

M3 - Article

AN - SCOPUS:0346896460

SN - 0004-637X

VL - 598

SP - 242

EP - 249

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 I

ER -

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

Abstract

Keywords

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