The In-Flight Realtime Trigger and Localization Software of GECAM
Xiao-Yun Zhao, Shao-Lin Xiong, Xiang-Yang Wen, Xin-Qiao Li, Ce Cai,, Shuo Xiao, Qi Luo, Wen-Xi Peng, Dong-Ya Guo, Zheng-Hua An, Ke Gong, Jin-Yuan, Liao, Yan-Qiu Zhang, Yue Huang, Lu Li, Xing Wen, Fei Zhang, Jing Duan,, Chen-Wei Wang, Dong-Li Shi, Peng Zhang, Qi-Bin Yi

TL;DR
This paper details the development and validation of a real-time onboard trigger and localization software for GECAM, enabling efficient detection and positioning of gamma-ray bursts with low latency and high accuracy.
Contribution
It introduces a multifunctional onboard software system with optimized algorithms for real-time burst detection and localization on GECAM, including verification through ground tests and in-flight data.
Findings
High trigger efficiency for celestial bursts
Low false trigger rate due to background suppression
Successful real-time localization with minimal latency
Abstract
Realtime trigger and localization of bursts are the key functions of GECAM, which is an all-sky gamma-ray monitor launched in Dec 10, 2020. We developed a multifunctional trigger and localization software operating on the CPU of the GECAM electronic box (EBOX). This onboard software has the following features: high trigger efficiency for real celestial bursts with a suppression of false triggers caused by charged particle bursts and background fluctuation, dedicated localization algorithm optimized for short and long bursts respetively, short time latency of the trigger information which is downlinked throught the BeiDou satellite navigation System (BDS). This paper presents the detailed design and deveopment of this trigger and localization software system of GECAM, including the main functions, general design, workflow and algorithms, as well as the verification and demonstration of…
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Taxonomy
TopicsPulsars and Gravitational Waves Research · Geophysics and Gravity Measurements · Gamma-ray bursts and supernovae
