TITLE:   GCN CIRCULAR
NUMBER:  44287
SUBJECT: GRB 260410A: Insight-HXMT/HE detection
DATE:    26/04/13 12:54:41 GMT
FROM:    zhangjinpeng@ihep.ac.cn

Jin-Peng Zhang, Chen-Wei Wang, Chao Zheng, and Shao-Lin Xiong (IHEP) report on behalf of the Insight-HXMT team:

At 2026-04-10T07:03:56.950 (T0), Insight-HXMT/HE detected GRB 260410A, which is also detected by Fermi/GBM (Fermi GBM Team, GCN #44252; Hamburg et al., GCN #44258) and Fermi/LAT (Holzmann Airasca et al., GCN #44253).

The Insight-HXMT/HE light curve mainly consists of a single pulse with a T90 of 0.6 +0.5/-0.3 s. Insight-HXMT/HE detected a total of 1462 counts from this burst.

The Insight-HXMT/HE light curve can be found here:
https://www.bursthub.cn//admin/static/hxmtgrb260410A.png

All measurements above are made with the CsI detectors of Insight-HXMT/HE operating in the low gain mode with the energy range of about 300-3000 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