GCN 43385: GRB 260111A: GECAM-B observation of a burst

2026-01-13T06:22:50.215Z | rev 0 | event: GRB 260111A

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

GECAM-B was triggered on-ground by GRB 260111A, at 2026-01-11T16:33:15.000 UTC (denoted as T0), which is also detected by Fermi/GBM (Fermi GBM team, GCN #43370).

According to the GECAM-B light curves in about 70-6000 keV, this burst mainly consists of multiple pulses with a duration (T90) of  33 +13/-12 s.

The GECAM-B light curve can be found here:
https://www.bursthub.cn//admin/static/gecambgrb260111A.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).