| GRB 210121A: A Typical Fireball Burst Detected by Two Small Missions | |
| Wang, Xiangyu Ivy; Zheng, Xutao; Xiao, Shuo; Yang, Jun; Liu, Zi-Ke; Yang, Yu-Han; Zou, Jin-Hang; Zhang, Bin-Bin; Zeng, Ming; Xiong, Shao-Lin | |
| 学科主题 | Astrophysics |
| 关键词 | High Energy Astrophysical Phenomena |
| 英文摘要 | The Chinese CubeSat Mission, Gamma Ray Integrated Detectors (GRID), recently detected its first gamma-ray burst, GRB 210121A, which was jointly observed by the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM). This burst is confirmed by several other missions, including \fermi and \textit{Insight}-HXMT. We combined multi-mission observational data and performed a comprehensive analysis of the burst's temporal and spectral properties. Our results show that the burst is relatively special in its high peak energy, thermal-like low energy indices, and large fluence. By putting it to the $E_{\rm p}$-$E_{\rm\gamma, iso}$ relation diagram with assumed distance, we found this burst can be constrained at the redshift range of [0.3,3.0]. The thermal spectral component is also confirmed by the direct fit of the physical models to the observed spectra. Interestingly, the physical photosphere model also constrained a redshift of $z\sim$ 0.3 for this burst, which help us to identify a host galaxy candidate at such a distance within the location error box. Assuming the host galaxy is real, we found the burst can be best explained by the photosphere emission of a typical fireball with an initial radius of $r_0\sim$ 3.2 $\times 10^7$ cm. |
| 2021 | |
| 语种 | 英语 |
| 内容类型 | 预印本 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/289907]  |
| 专题 | 引力波暴高能电磁对应体全天监测器（GECAM） 高能物理研究所_粒子天体物理中心 高能物理研究所_计算中心 硬X射线调制望远镜卫星 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Wang, Xiangyu Ivy,Zheng, Xutao,Xiao, Shuo,et al. GRB 210121A: A Typical Fireball Burst Detected by Two Small Missions. 2021. |
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