{
  "bibcode": "2021GCN.30345....1X",
  "body": "W. C. Xue, S. L. Xiong, X. Y. Song, Y. Huang, S. L. Xie, S. Xiao, C. Cai,\nJ. C. Liu, C. Y. Li, Y. Q. Zhang,  Y. Zhao, Z. W. Guo, X. Y. Zhao, C. Zheng,\nZ. H. An, C. Chen, G. Chen, W. Chen, M. Gao, K. Gong, D. Y. Guo, J. J. He,\nB. Li, C. Li, J. H. Li, Q. X. Li, X. B. Li, X. Q. Li, Y. G. Li, X. H. Liang,\nJ. Y. Liao, J. C. Liu, X. J. Liu, Y. Q. Liu, F. J. Lu, Q. Luo, X. Ma,\nG. Ou, W. X. Peng, R. Qiao, D. L. Shi, J. Y. Shi, L. M. Song,\nG. X. Sun, X. L. Sun, Y. L. Tuo, C. W. Wang, J. Z. Wang,\nP. Wang, X. Y. Wen, Y. B. Xu, Y. P. Xu, S. Yang, M. Yao, Q. B. Yi,\nB. X. Zhang, C. Y. Zhang, D. L. Zhang, Fan Zhang, Fei Zhang, H. M. Zhang,\nK. Zhang, P. Zhang, S. N. Zhang, Z. Zhang, S. Y. Zhao, S. J. Zheng,\nX. Zhou (IHEP), report on behalf of GECAM team:\n\nDuring the commissioning phase, GECAM-B was triggered in-flight by a long\nburst, GRB 210627B, at 2021-06-27T17:57:21.550 UTC (denoted as T0), which was\nalso observed by Fermi/GBM (GCN #30332).\n\nAccording to the GECAM-B light curves in about 20-500 keV, \nthis burst mainly consists of multiple pulses with a duration of 14.33 s.\n\nThe GECAM light curve could be found here:\nhttp://twiki.ihep.ac.cn/pub/GECAM/GRBList/multiLCvsE_tn210627_175830.png\n\nGECAM-B localized this burst to the following position (J2000):\nRa: 240.1 deg\nDec: 2.0 deg\nErr: 5.3 deg (1-sigma, statistical only)\nThe current systematic error of location is estimated to be several degrees\nwhich could be minimized by the ongoing calibration. This position is \nconsistent with the Fermi GBM localization (GCN #30332 and #30333) within\nthe error.\n\nThe location map could be found here:\nhttp://twiki.ihep.ac.cn/pub/GECAM/GRBList/tn210627_175830_locationSatB_map.png\n\nPlease note that all GECAM results here are preliminary. The final analysis\nwill be published in journal papers or GECAM online catalog.\n\nGravitational wave high-energy Electromagnetic Counterpart All-sky Monitor\n(GECAM) mission consists of two small satellites (GECAM-A and GECAM-B) in\nLow Earth Orbit (600 km, 29 deg), launched on Dec 10, 2020 (Beijing Time),\nwhich was funded by the Chinese Academy of Sciences (CAS).",
  "circularId": 30345,
  "createdOn": 1625026042000,
  "email": "xuewc@ihep.ac.cn",
  "subject": "GRB 210627B: GECAM detection",
  "submitter": "Wangchen Xue at IHEP  <xuewc@ihep.ac.cn>",
  "eventId": "GRB 210627B"
}