Energetic transients joint analysis system for multi-INstrument (ETJASMIN) for GECAM – I. Positional, temporal, and spectral analyses
Shuo Xiao, S. L. Xiong, Ce Cai, L. M. Song, S. J. Zheng, Wen-Xi Peng, Ping Wang, Rui Qiao, D. Y. Guo, Jin Wang, Xiao‐Bo Li, X. Y. Song, Yong Yuan, Xi-Long Fan, Xiao‐Yun Zhao, Y. Huang, Xiang Ma, Peng Zhang, Bing Li, M. Y. Ge, Y. L. Tuo, Wei Chen, Hongmei Zhang, J. He, Chaoyang Li, Qi-Bin Yi, Y. Zhao, Yan-Qiu Zhang, Chao Zheng, W. C. Xue, Jia-Cong Liu, Zhen Zhang, Cheng-Kui Li, Xiao-Lu Zhang, Hongyu Zhao, Guoying Zhao, Zhiwei Guo, Sheng-Lun Xie, Chen-Wei Wang, Boxin Zhang, Yue Wang, Qingxin Li, Chao Li, Kai Zhang, Dong-Li Shi, Shiyi Zhao, Min Yao, Zhenghua An, Chan Chen, Ke Gong, Yaqing Liu, Min Gao, Xinqiao Li, Yanguo Li, Xiao-Hua Liang, Xiaojing Liu, Xi-Lei Sun, Jinzhou Wang, Xiang-Yang Wen, Yanbing Xu, Y. P. Xu, S. Yang, Chaoyue Zhang, Dali Zhang, Fei Zhang, Gang Chen, F. J. Lu, Gongxing Sun, Fan Zhang, Shuang‐Nan Zhang
Abstract
ABSTRACT Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) is a dedicated mission, launched in December 2020, for gamma-ray transients, including gamma-ray bursts (GRBs) and soft gamma repeater (SGR) bursts in the multimessenger and multiwavelength astronomy era. Since GECAM consists of two independent spacecrafts (or say instruments), and the framework of data analysis for multiple spacecrafts is distinctive from that for only one spacecraft, which is the case for most GRB missions, we developed a dedicated pipeline called Energetic Transients Joint Analysis System for Multi-INstrument (ETJASMIN) for GECAM mission. This pipeline has been naturally extended to incorporate data from other gamma-ray instruments, including the operating missions, such as Insight-HXMT/HE, Fermi/GBM, Swift/BAT, INTEGRAL/SPI-ACS, Konus-Wind, and GRID, as well as the forthcoming missions, such as SVOM/GRM and HEBS. In this paper, we present this pipeline with a focus on the data analysis procedures, methodology, and results in terms of the localization, verification (classification), spectral, and temporal analyses of gamma-ray transients. We show that this pipeline could provide more accurate, reliable, and comprehensive results than that of individual spacecraft, which is beneficial for gamma-ray transients observation.