TITLE: GCN CIRCULAR NUMBER: 44077 SUBJECT: GRB 260320A: Insight-HXMT/HE detection DATE: 26/03/22 08:44:50 GMT FROM: Xinghao Luo at IHEP <2952704891@qq.com> Xing-Hao Luo, Chen-Wei Wang, Chao Zheng, Cheng-Kui Li and Shao-Lin Xiong (IHEP) report on behalf of the Insight-HXMT team: At 2026-03-20T19:40:04.700 (T0), Insight-HXMT/HE detected the burst GRB 260320A, which is also detected by NuSTAR (G. Waratkar et.al., GCN #44064). The Insight-HXMT/HE light curve mainly consists of a single pulse with a T90 of 4.4 +1.2/-0.8 s. The 1s peak rate, measured from T0-0.7 s, is 2511 cnts/sec. Insight-HXMT/HE detected a total of 5253 counts from this burst. The HXMT/HE light curve can be found here: https://www.bursthub.cn//admin/static/hxmtgrb260320A.png All measurements above are made with the CsI detectors of Insight-HXMT/HE operating in the regular 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/ View this GCN Circular online at https://gcn.nasa.gov/circulars/44077. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...