Suzaku observation of TeV SNR RX J1713.7-3946

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作者
Takahashi, Tadayuki [1 ,2 ]
Tanaka, Takaaki [1 ,3 ]
Uchiyama, Yasunobu [1 ]
Hiraga, Junko S. [4 ]
Nakazawa, Kazuhiro [2 ]
Watanabe, Shin [1 ]
Bamba, Aya [4 ]
Hughes, John P. [5 ]
Katagiri, Hideaki [6 ]
Kataoka, Jun [7 ]
Kokubun, Motohide [1 ]
Koyama, Katsuji [8 ]
Mopa, Koji [9 ]
Petre, Robert [10 ]
Takahashi, Hiromitsu
Tsub, Yoko [11 ]
机构
[1] JAXA, ISAS, Kanagawa 2298558, Japan
[2] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan
[3] Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA
[4] RIKEN, Cosm Radiat Lab, Wako, Saitama 3510198, Japan
[5] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA
[6] Hiroshima Univ, Dept Phys Sci, Higashihiroshima 7398526, Japan
[7] Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan
[8] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan
[9] Miyazaki Univ, Dept Appl Phys, Miyazaki 8892192, Japan
[10] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20771 USA
[11] Chuo Univ, Dept Phys, Tokyo 112855, Japan
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中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We report on results from Suzaku broadband X-ray observations of the Galactic supernova, remnant (SNR) RX J1713.7-3946 with an energy coverage of 0.4-40 keV. With a sensitive hard X-ray measurement from the HXD PIN on board Suzaku, we determine the hard X-ray spectrum in the 12-40 keV range to be described by a power law with photon index Gamma = 3.2 +/- 0.2, significantly steeper than the soft X-ray index of Gamma = 2.4 +/- 0.05 measured previously with ASCA and other missions. We find that a simple power law fails to describe the full spectral range of 0.4-40 keV and instead a cutoff power law with bard index Gamma = 1.96 +/- 0.05 and high energy cutoff epsilon(c) = 9 +/- 1 keV provides an excellerit fit over the full bandpass.
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页码:157 / 161
页数:5
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