학술논문
Measurement of the Gamma-Ray Energy Spectrum beyond 100 TeV from the HESS J1843$-$033 Region
Document Type
Working Paper
Author
Amenomori, M.; Asano, S.; Bao, Y. W.; Bi, X. J.; Chen, D.; Chen, T. L.; Chen, W. Y.; Chen, Xu; Chen, Y.; Cirennima; Cui, S. W.; Danzengluobu; Ding, L. K.; Fang, J. H.; Fang, K.; Feng, C. F.; Feng, Zhaoyang; Feng, Z. Y.; Gao, Qi; Gomi, A.; Gou, Q. B.; Guo, Y. Q.; Guo, Y. Y.; He, H. H.; He, Z. T.; Hibino, K.; Hotta, N.; Hu, Haibing; Hu, H. B.; Hu, K. Y.; Huang, J.; Jia, H. Y.; Jiang, L.; Jiang, P.; Jin, H. B.; Kasahara, K.; Katayose, Y.; Kato, C.; Kato, S.; Kawashima, T.; Kawata, K.; Kozai, M.; Kurashige, D.; Labaciren; Le, G. M.; Li, A. F.; Li, H. J.; Li, W. J.; Li, Y.; Lin, Y. H.; Liu, B.; Liu, C.; Liu, J. S.; Liu, L. Y.; Liu, M. Y.; Liu, W.; Liu, X. L.; Lou, Y. -Q.; Lu, H.; Meng, X. R.; Meng, Y.; Munakata, K.; Nagaya, K.; Nakamura, Y.; Nakazawa, Y.; Nanjo, H.; Ning, C. C.; Nishizawa, M.; Ohnishi, M.; Okukawa, S.; Ozawa, S.; Qian, L.; Qian, X.; Qian, X. L.; Qu, X. B.; Saito, T.; Sakakibara, Y.; Sakata, M.; Sako, T.; Sako, T. K.; Shao, J.; Shibata, M.; Shiomi, A.; Sugimoto, H.; Takano, W.; Takita, M.; Tan, Y. H.; Tateyama, N.; Torii, S.; Tsuchiya, H.; Udo, S.; Wang, H.; Wang, Y. P.; Wangdui; Wu, H. R.; Wu, Q.; Xu, J. L.; Xue, L.; Yang, Z.; Yao, Y. Q.; Yin, J.; Yokoe, Y.; Yu, N. P.; Yuan, A. F.; Zhai, L. M.; Zhang, C. P.; Zhang, H. M.; Zhang, J. L.; Zhang, X.; Zhang, X. Y.; Zhang, Y.; Zhang, Yi; Zhang, Ying; Zhao, S. P.; Zhaxisangzhu; Zhou, X. X.
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Subject
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Abstract
HESS J1843$-$033 is a very-high-energy gamma-ray source whose origin remains unidentified. This work presents, for the first time, the energy spectrum of gamma rays beyond $100\, {\rm TeV}$ from the HESS J1843$-$033 region using the data recorded by the Tibet air shower array and its underground muon detector array. A gamma-ray source with an extension of $0.34^{\circ} \pm 0.12^{\circ}$ is successfully detected above $25\, {\rm TeV}$ at $(\alpha,\, \delta) = (281.09^{\circ}\pm 0.10^{\circ},\, -3.76^{\circ}\pm 0.09^{\circ})$ near HESS J1843$-$033 with a statistical significance of $6.2\, \sigma$, and the source is named TASG J1844$-$038. The position of TASG J1844$-$038 is consistent with those of HESS J1843$-$033, eHWC J1842$-$035, and LHAASO J1843$-$0338. The measured gamma-ray energy spectrum in $25\, {\rm TeV} < E < 130\, {\rm TeV}$ is described with ${\rm d}N/{\rm d}E = (9.70\pm 1.89)\times 10^{-16} (E/40\, {\rm TeV})^{-3.26\pm 0.30}\, {\rm TeV}^{-1} {\rm cm}^{-2} {\rm s}^{-1}$, and the spectral fit to the combined spectra of HESS J1843$-$033, LHAASO J1843$-$0338, and TASG J1844$-$038 implies the existence of a cutoff at $49.5\pm 9.0\, {\rm TeV}$. Associations of TASG J1844-038 with SNR G28.6$-$0.1 and PSR J1844-0346 are also discussed in detail for the first time.
Comment: 11 pages, 4 figures, 1 table
Comment: 11 pages, 4 figures, 1 table