TITLE:   GCN CIRCULAR
NUMBER:  45817
SUBJECT: GRB 261001A: GECAM-B observation of a likely long GRB
DATE:    26/10/06 08:43:08 GMT
FROM:    Xinghao Luo at IHEP <2952704891@qq.com>

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

GECAM-B was triggered on-ground by GRB 261001A, at 2026-10-01T12:52:04.950 UTC (denoted as T0).

According to the GECAM-B light curves in about 70-6000 keV, this burst mainly consists of multiple pulses with a duration (T90) of 42 +/-1 s.

The GECAM-B light curve can be found here:
https://www.bursthub.cn//gcn/2026/gecambgrb261001A.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).