{
  "bibcode": "2021GCN.30922....1Z",
  "body": "Y. Q. Zhang, S. L. Xiong, S. Xiao, C. Cai, X. Y. Zhao, Y. Huang, X. Y. Song,\nJ. C. Liu, S. L. Xie,  Y. Zhao, Z. W. Guo, C. Zheng, W. C. Xue, C. Y. Li,\nC. W. Wang, Q. B. Yi, B. X. Zhang, P. Zhang, W. X. Peng, R. Qiao, D. Y. Guo,\nX. B. Li, X. Ma, P. Wang, J. Wang, Z. Zhang, S. J. Zheng, W. Chen, J. J. He, \nG. Y. Zhao, Y. Q. Du, H. Wu, J. Liang, Q. Luo, X. L. Zhang,\nL. M. Song, F. J. Lu, S. N. Zhang (IHEP), report on behalf of GECAM team:\n\nDuring the commissioning phase, GECAM-B was triggered on-ground by\na bright short burst from SGR J1555.2-5402 at 2021-10-04T00:13:14.700 UTC (T0).\n\nAccording to the GECAM-B light curves in about 10-50 keV, this burst mainly\nconsists of a single pulse with a duration about 30 ms.The location given by \nGECAM-B alone is consistent with SGR J1555.2-5402 within the error.\n\nGECAM-B localized this burst to the following position (J2000): \nRa: 241.96 deg \nDec: -55.45 deg\nErr: 9.01 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.\n\nThe GECAM light curve could be found here: \nhttp://twiki.ihep.ac.cn/pub/GECAM/GRBList/utn211004_001314_GECAMb.png\n\nAccording to our multiple-mission joint location pipeline (S. Xiao et al.,\naccepted by ApJ) using GECAM-B and Fermi/GBM data, this burst is localized to\nan annulus which is very consistent with SGR J1555.2-5402. \n\nThe GECAM-GBM joint location could be found here:\nhttp://twiki.ihep.ac.cn/pub/GECAM/GRBList/SGR20211004T001314.700-JointLoc.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": 30922,
  "createdOn": 1633443438000,
  "email": "yqzhang@ihep.ac.cn",
  "subject": "GECAM observation of a burst from SGR J1555.2-5402",
  "submitter": "Y Q Zhang at IHEP  <yqzhang@ihep.ac.cn>"
}