Search for steady emission of 10-TeV gamma rays from the Crab Nebula, Cygnus X-3, and Hercules X-1 using the tibet air shower array

M. Amenomori, Z. Cao, L. K. Ding, Z. Y. Feng, K. Hibino, N. Hotta, Q. Huang, A. X. Huo, H. Y. Jia, G. Z. Jiang, S. Q. Jiao, F. Kajino, K. Kasahara, Labaciren, D. M. Mei, L. Meng, X. R. Meng, Mimaciren, K. Mizutani, J. MuH. Nanjo, M. Nishizawa, Nusang, A. Oguro, M. Ohnisni, I. Ohta, J. R. Ren, To Saito, M. Sakata, Z. Z. Shi, M. Shibata, T. Shirai, H. Sugimoto, X. X. Sun, A. Tai, K. Taira, Y. H. Tan, N. Tateyama, Shoji Torii, H. Wang, C. Z. Wen, Y. Yamamoto, X. Y. Yao, G. C. Yu, P. Yuan, T. Yuda, J. G. Zeng, C. S. Zhang, H. M. Zhang, L. Zhang, Zhasang, Zhaxiciren, W. D. Zhou

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Abstract

The Tibet air shower array at an altitude of 4300 m (above sea level) has been in operation since January 1990. We have searched for continual emission of 10-TeV gamma rays from the Crab Nebula, Cygnus X-3, and Hercules X-1 during the period from June 1990 through January 1992. No dc excess is found from these three sources. Flux upper limits above 10 TeV are obtained to be 1.2×10-12 cm-2s-1 for the Crab Nebula, 1.1×10-12 cm-2s-1 for Cygnus X-3, and 0.58×10-12 cm-2s-1 for Hercules X-1 at the 95% C.L. This is the first observation, with an air shower array, for these sources in the 10-TeV energy region.

Original languageEnglish
Pages (from-to)2468-2471
Number of pages4
JournalPhysical Review Letters
Volume69
Issue number17
Publication statusPublished - 1992 Oct 26
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Amenomori, M., Cao, Z., Ding, L. K., Feng, Z. Y., Hibino, K., Hotta, N., Huang, Q., Huo, A. X., Jia, H. Y., Jiang, G. Z., Jiao, S. Q., Kajino, F., Kasahara, K., Labaciren, Mei, D. M., Meng, L., Meng, X. R., Mimaciren, Mizutani, K., ... Zhou, W. D. (1992). Search for steady emission of 10-TeV gamma rays from the Crab Nebula, Cygnus X-3, and Hercules X-1 using the tibet air shower array. Physical Review Letters, 69(17), 2468-2471.