TITLE:   GCN CIRCULAR
NUMBER:  31159
SUBJECT: GRB 211201A: GECAM detection
DATE:    21/12/03 01:04:55 GMT
FROM:    Guoying Zhao at IHEP  <gyzhao@ihep.ac.cn>

G. Y. Zhao, S. L. Xiong,X. L. Zhang, S. Xiao, Yi Zhao, C. Cai, J. J. He, 
Y. Huang, Z. W. Guo, C. Y. Li, X. B. Li, J. C. Liu, X. Y. Song, P. Wang,
S. L. Xie, W. C. Xue, Q. B. Yi, Y. Q. Zhang,  X. Y. Zhao, C. Zheng,
Y. Q. Du, D. Y. Guo, J. Liang, F. J. Lu, Q. Luo, X. Ma, W. X. Peng,
R. Qiao, L. M. Song, J. Wang, H. Wu, P. Zhang, S. N. Zhang,
C. W. Wang,Z. Zhang, S. J. Zheng (IHEP),report on behalf of GECAM team:

During the commissioning phase, GECAM-B was triggered on-ground by a 
long bright burst, GRB 211201A, at 2021-12-01T20:43:06.000 UTC (denoted as T0)，
which was also observed by Fermi/GBM (GCN #31155).

This burst mainly consists of multiple pulses with duration of about 50 s.

The GECAM light curve could be found here:
http://twiki.ihep.ac.cn/pub/GECAM/GRBList/LightCurve.png

GECAM location is consistent with the Fermi/GBM position within the error.

Please note that all GECAM results here are preliminary. The final analysis
will be published in journal papers or GECAM online catalog.

Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor
(GECAM) mission consists of two small satellites (GECAM-A and GECAM-B) in
Low Earth Orbit (600 km, 29 deg), launched on Dec 10, 2020 (Beijing Time),
which was funded by the Chinese Academy of Sciences (CAS).