GCN Circular 45511
Subject
GRB 260830A: Insight-HXMT/HE detection
Event
Date
2026-09-04T06:53:59Z (14 hours ago)
From
yzh807926@163.com
Via
Web form
Zheng-Hang Yu and Shao-Lin Xiong (IHEP) report on behalf of the Insight-HXMT team:
At 2026-08-30T19:32:13.02 (T0), Insight-HXMT/HE detected GRB 260830A, which is also detected by NuSTAR (G. Waratkar et al., GCN #45483).
The Insight-HXMT/HE light curve mainly consists of multiple pulses with a T90 of 9 +7/-3 s. The 1 s peak rate, measured from T0+5.5 s, is 552 cnts/sec. Insight-HXMT/HE detected a total of 3815 counts from this burst.
The Insight-HXMT/HE light curve can be found here:
https://www.bursthub.cn/gcn/2026/hxmtgrb260830A.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://www.hxmt.org