We present the detection of a blackbody component in GRB 160107A emission by using the combined spectral data of the CALET Gamma-ray Burst Monitor (CGBM) and the MAXI Gas Slit Camera (GSC). The 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 well fit by a blackbody with the temperature of 1.0−0.2+0.3 keV plus a power-law with the photon index of −1.6±0.3. We discuss the radius to the photospheric emission and the main burst emission based on the observational properties. We stress the importance of the coordinated observations via various instruments collecting the high quality data over a broad energy coverage in order to understand the GRB prompt emission mechanism.
@article{arxiv.1712.02940,
title = {Detection of the thermal component in GRB 160107A},
author = {Yuta Kawakubo and Takanori Sakamoto and Satoshi Nakahira and Kazutaka Yamaoka and Motoko Serino and Yoichi Asaoka and M. L. Cherry and Shohei Matsukawa and Masaki Mori and Yujin Nakagawa and Shunsuke Ozawa and A. V. Penacchioni and S. B. Ricciarini and Akira Tezuka and Shoji Torii and Yusuke Yamada and Atsumasa Yoshida},
journal= {arXiv preprint arXiv:1712.02940},
year = {2018}
}
Comments
19 pages, 13 figures, accepted for publication in PASJ