{
  "bibcode": "2017GCN.21919....1Z",
  "body": "Y. F. Zhang, S. L. Xiong, J. Y. Liao, C. K. Li, X. B. Li, C. Z. Liu,\nX. F. Li, Z. W. Li, Z. Chang, X. F. Lu, J. L. Zhao, A. M. Zhang,\nC. L. Zou (IHEP), Y. J. Jin, Z. Zhang (THU), T. P. Li (IHEP/THU),\nF. J. Lu, L. M. Song, H. Y. Wang, M. Wu, Y. P. Xu, S. N. Zhang (IHEP),\nreport on behalf of the Insight-HXMT team:\n\nDuring the commissioning phase, at 2017-09-21T00:43:37.00 (T0),\nInsight-HXMT/HE detected GRB 170921C (trigger ID: HEB170921030)\nwith a significance of 12 sigma in a routine search of the data,\nwhich is also detected by Fermi/GBM subthreshold trigger\n(trig time: 2017-09-21T00:43:37.18).\n\nThe Insight-HXMT light curve mainly consists of a single pulse\nwith a duration (T90) of 1.2 s measured from T0-0.27 s.\nThe 500-ms peak rate, measured from T0+0.06 s, is 1220.3 cnts/sec.\nThe total counts from this burst is 1247.3 counts.\n\nURL_LC: http://www.hxmt.org/images/GRB/HEB170921030_lc.jpg\n\nAll measurements above are made with the CsI detectors operating in the\nregular mode with the energy range of about 80-800 keV (record energy).\nOnly gamma-rays with energy greater than about 200 keV can penetrate\nthe spacecraft and leave signals in the CsI detectors installed inside\nof the telescope.\n\nThe analysis results presented above are preliminary;\nfinal results will be published elsewhere.\n\nInsight-HXMT is the first Chinese space X-ray telescope, which was funded\njointly by the China National Space Administration (CNSA) and the Chinese\nAcademy of Sciences (CAS). More information about it could be found at:\nhttp://www.hxmt.org/index.php/enhome .\n\n[GCN OPS NOTE(26sep17):  The name was changed from \"21A\" to \"21C\".]",
  "circularId": 21919,
  "createdOn": 1506189577000,
  "email": "xiongsl@ihep.ac.cn",
  "subject": "GRB 170921C: Insight-HXMT detection",
  "submitter": "Shaolin Xiong at IHEP  <xiongsl@ihep.ac.cn>",
  "eventId": "GRB 170921C"
}