TITLE:   GCN CIRCULAR
NUMBER:  43101
SUBJECT: GRB 251214A: GECAM-B observation of a likely long burst
DATE:    25/12/15 01:08:35 GMT
FROM:    Xinghao Luo at SVOM/GRN <2952704891@qq.com>

Xing-Hao Luo, Chen-Wei Wang, Shao-Lin Xiong (IHEP) report on behalf of GECAM team:

GECAM-B was triggered on-ground by GRB 251214A, at 2025-12-14T00:11:15.200 UTC (denoted as T0), which is also detected by Fermi/GBM (Fermi GBM team, GCN #43085). 

According to the GECAM-B light curves in about 70-6000 keV, this burst mainly consists of multiple pulses with a duration (T90) of  5.0 +1.0/-2.5s.

The GECAM-B light curve can be found here:
https://www.bursthub.cn//admin/static/gecambgrb251214A.png

Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) mission originally consists of two micro-satellites (GECAM-A and GECAM-B) launched in Dec. 2020. As the third member of GECAM constellation, GECAM-C was launched onboard SATech-01 experimental satellite in July 2022. GECAM mission is funded by the Chinese Academy of Sciences (CAS).