GRB 210121A：由两项小型任务探测到的典型火球暴
高能天体物理现象
2021-12-09 v3
摘要
中国立方星任务伽马射线集成探测器（GRID）最近探测到了其首个伽马射线暴 GRB 210121A，该暴由引力波高能电磁对应体全天监测器（GECAM）联合观测到。此次暴被包括 \fermi 与 \textit{Insight}-HXMT 在内的若干其他任务所确认。我们结合了多任务观测数据，并对该暴的时间与能谱性质进行了综合分析。我们的结果表明，该暴在其高峰值能量、类热低能谱指数以及大总辐射流量方面相对特殊。将其置于带假设距离的 - 关系图中，我们发现该暴可被约束在红移区间 [0.3,3.0] 内。对观测能谱直接进行物理模型拟合也确认了热谱成分。有趣的是，物理光球层模型同样约束出该暴的红移为 0.3，这有助于我们在定位误差框内如此距离处找到一个宿主星系候选体。假设该宿主星系为真，我们发现该暴可由初始半径 3.2 cm 的典型火球的光球层辐射最佳解释。
引用
@article{arxiv.2107.10452,
title = {GRB 210121A: A Typical Fireball Burst Detected by Two Small Missions},
author = {Xiangyu Ivy Wang and Xutao Zheng and Shuo Xiao and Jun Yang and Zi-Ke Liu and Yu-Han Yang and Jin-Hang Zou and Bin-Bin Zhang and Ming Zeng and Shao-Lin Xiong and Hua Feng and Xin-Ying Song and Jiaxing Wen and Dacheng Xu and Guo-Yin Chen and Yang Ni and Yu-Xuan Wu and Zi-Jian Zhang and Ce Cai and Jirong Cang and Yun-Wei Deng and Huaizhong Gao and De-Feng Kong and Yue Huang and Cheng-kui Li and Hong Li and Xiao-Bo Li and En-Wei Liang and Lin Lin and Yihui Liu and Xiangyun Long and Dian Lu and Qi Luo and Yong-Chang Ma and Yan-Zhi Meng and Wen-Xi Peng and Rui Qiao and Li-Ming Song and Yang Tian and Pei-Yuan Wang and Ping Wang and Xiang-Gao Wang and Sheng Xu and Dongxin Yang and Yi-Han Yin and Weihe Zeng and Zhi Zeng and Ting-Jun Zhang and Yuchong Zhang and Zhao Zhang and Zhen Zhang},
journal= {arXiv preprint arXiv:2107.10452},
year = {2021}
}
备注
ApJ accpeted; 12 pages, 11 figures, 3 tables