发表机构
The George Washington University; NASA Goddard Space Flight Center; Louisiana State University; INAF - Osservatorio di Astrofisica e Scienza dello Spazio di Bologna; Clemson University; Johannes Gutenberg-Universität Mainz; University of California Berkeley; NASA Marshall Space Flight Center; National Tsing Hua University（乔治华盛顿大学; NASA戈达德太空飞行中心; 路易斯安那州立大学; 意大利国家天体物理研究所-博洛尼亚天体物理与空间科学观测站; 克莱姆森大学; 约翰内斯·古腾堡大学美因茨分校; 加州大学伯克利分校; NASA马歇尔太空飞行中心; 国立清华大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文通过模拟COSI对短伽马射线暴的观测并应用星上触发算法，预测其每年可探测约47-89个sGRBs，其中7-10个定位精度在2.5°内，并预计与引力波联合探测0-3次。
AI 中文摘要
康普顿光谱仪与成像仪（COSI）是一台计划于2027年发射的软伽马射线望远镜。COSI将在航天器上针对包括伽马射线暴在内的短时标瞬变事件触发星上警报，并及时向学界发布包含定位信息的警报。这将使得对余辉的快速后续观测以及与其他仪器所识别瞬变事件的关联成为可能。通过模拟COSI对短伽马射线暴（sGRBs）的观测，并使用将在航天器上运行的触发算法进行处理，我们估算了COSI对sGRBs的灵敏度。随后，我们将此灵敏度与一组代表宇宙中内在sGRB群体的模拟样本进行卷积，以预测COSI将探测到的sGRB发生率。我们发现，COSI预计每年将触发约47至89个sGRBs，其中约7至10个的定位精度在2.5°以内。考虑到O5运行阶段预期的引力波灵敏度，我们预测与引力波的联合探测事件为0至3次。
英文摘要
The Compton Spectrometer and Imager (COSI) is a soft gamma-ray telescope scheduled to launch in 2027. COSI will trigger onboard the spacecraft in response to short-duration transients, including gamma-ray bursts, and it will promptly disseminate alerts which include localizations to the community. This will enable rapid follow-up observations of the afterglow and associations with transients identified by other instruments. By simulating COSI observations of short gamma-ray bursts (sGRBs) and processing them with the trigger algorithm which will run onboard the spacecraft, we estimate the sensitivity of COSI to sGRBs. We then convolve this with a simulated set of sGRBs representing the intrinsic population in the universe to predict the rate that will be detected by COSI. We find that COSI is expected to trigger on $\sim$47-89 sGRBs per year with $\sim$7-10 localized to within 2.5°. With the gravitational wave sensitivity anticipated in the O5 run, we predict 0-3 joint detections with gravitational waves.
CommentsSubmitted to ApJ
