Detection of the thermal component in GRB 160107A

PASJ: Publications of the Astronomical Society of Japan

Ricciarini, Sergio B¹  Nakagawa, Yujin²  Penacchioni, Ana V³  Mori, Masaki⁴  Cherry, Michael L⁵  Kawakubo, Yuta⁶  Sakamoto, Takanori⁶  Yoshida, Atsumasa⁶  Torii, Shoji⁶  Serino, Motoko⁶  Matsukawa, Shohei⁶  Yamaoka, Kazutaka⁷  Tezuka, Akira⁸  Nakahira, Satoshi⁹  Yamada, Yusuke^1,10  Ozawa, Shunsuke^1,10  Asaoka, Yoichi^1,10 

[1] ASI Science Data Center (ASDC), Via del Politecnico snc, 00133 Rome, Italy;Center for Earth Information Science and Technology, Japan Agency for Marine-Earth Science and Technology, 3173-25 Showa-machi, Kanazawa-ku, Yokohama, Kanagawa 236-0001, Japan;Department of Physical Science, Earth and Environment, University of Siena, via Roma 56, 53100, Siena, Italy;Department of Physical Sciences, College of Science and Engineering, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu, Shiga 525-8577, Japan;Department of Physics and Astronomy, Louisiana State University, 202 Nicholson Hall, Baton Rouge, LA 70803, USA;Department of Physics and Mathematics, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan;Institute for Space-Earth Environmental Research (ISEE), Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8601, Japan;Institute of Applied Physics (IFAC), National Research Council (NRC), Via Madonna del Piano, 10, 50019 Sesto, Fiorentino, Italy;MAXI team, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan;Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan

关键词: radiation mechanisms: non-thermal;    radiation mechanisms: thermal;    (stars:) gamma-ray burst: general;    (stars:) gamma-ray burst: individual;   

DOI  :  10.1093/pasj/psx152

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

We present the detection of a blackbody component in gamma-ray burst GRB 160107A emission by using the combined spectral data of the CALET Gamma-ray Burst Monitor (CGBM) and the MAXI Gas Slit Camera (GSC). MAXI/GSC detected the emission ∼45 s prior to the main burst episode observed by the CGBM. The MAXI/GSC and the CGBM spectrum of this prior emission period is fitted well by a blackbody with temperature |$1.0^{+0.3}_{-0.2}$| keV plus a power law with a photon index of −1.6 ± 0.3. We discuss the radius of the photospheric emission and the main burst emission based on the observational properties. We stress the importance of coordinated observations via various instruments collecting high-quality data over a broad energy coverage in order to understand the GRB prompt emission mechanism.

【 授权许可】

CC BY