GCN Circular 45392
Subject
GRB 260810A: Insight-HXMT/HE detection
Event
Date
2026-08-18T06:57:05Z (5 days ago)
From
yzh807926@163.com
Via
Web form
Zheng-Hang Yu, Chao Zheng, and Shao-Lin Xiong (IHEP) report on behalf of the Insight-HXMT team:
At 2026-08-10T19:09:43.350 (T0), Insight-HXMT/HE detected GRB 260810A, which is also detected by AstroSat CZTI (A. Arya et al., GCN #45363), and Glowbug (C.C. Cheung et al., GCN #45365)
The Insight-HXMT/HE light curve mainly consists of two pulses with a T90 of 18.0 +7.0/-5.5 s. The 1 s peak rate, measured from T0+0.25 s, is 4028 cnts/sec. Insight-HXMT/HE detected a total of 15728 counts from this burst.
The Insight-HXMT/HE light curve can be found here:
https://www.bursthub.cn/gcn/2026/hxmtgrb260810A.png
All measurements above are made with the CsI detectors of Insight-HXMT/HE operating in the Normal mode with the energy range of about 60-900 keV (deposited energy). Only gamma-rays with energy greater than about 200 keV can penetrate the spacecraft and leave signals in the CsI detectors installed inside of the telescope.
Insight-HXMT is the first Chinese space X-ray telescope, which was funded jointly by the China National Space Administration (CNSA) and the Chinese Academy of Sciences (CAS). More information about it could be found at: http://hxmten.ihep.ac.cn