GCN Circular 43055
Subject
GRB 251208C: GECAM-B observation of a short burst
Event
Date
2025-12-09T16:16:20Z (3 days ago)
From
Yue Wang <m18509381757@163.com>
Via
Web form
Yue Wang, Chen-Wei Wang, Shao-Lin Xiong (IHEP) report on behalf of GECAM team:
GECAM-B was triggered on-ground by GRB 251208C, at 2025-12-08T12:52:32.600 UTC (denoted as T0), which is also detected by Fermi/GBM (Fermi GBM team, GCN #43030) and SVOM/GRM (Yue Wang et al., GCN #43041).
According to the GECAM-B light curves in about 70-6000 keV, this burst mainly consists of a single pulse with a duration (T90) of 0.3 +0.2/-0.2 s.
The GECAM-B light curve can be found here:
https://www.bursthub.cn//admin/static/gecambgrb251208C.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).