{
  "format": "text/plain",
  "circularId": 44374,
  "subject": "GRB 260418A: Insight-HXMT/HE detection",
  "eventId": "GRB 260418A",
  "submittedHow": "web",
  "submitter": "xueyuan zao <zaoxueyuan@gmail.com>",
  "body": "Xue-Yuan Zao, Chen-Wei Wang, Cheng-Kui Li, Shao-Lin Xiong, and Chao Zheng (IHEP) report on behalf of the Insight-HXMT team:\n\nAt 2026-04-18T04:49:35.000 (T0), Insight-HXMT/HE detected a short burst, GRB 260418A, which is also detected by Fermi/GBM (Fermi GBM Team, GCN #44335).\n\nThe Insight-HXMT/HE light curve mainly consists of a single pulse with a duration (T90) of 0.30 +0.55/-0.10 s. The 1s peak rate, measured from T0-0.475 s, is 361 cnts/sec. Insight-HXMT/HE detected a total of 292 counts from this burst.\n\nThe Insight-HXMT /HE light curve can be found here:\nhttps://www.bursthub.cn//admin/static/hxmtgrb260418A.png\n\nAll 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.\n\nInsight-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/\n",
  "createdOn": 1776767645179
}