GCN Circular 43317
Subject
GRB 260103A: GECAM-B observation of a burst
Event
Date
2026-01-04T08:59:17Z (6 days ago)
Edited On
2026-01-04T16:05:35Z (5 days ago)
From
Xinghao Luo at IHEP <2952704891@qq.com>
Edited By
Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Xinghao Luo at IHEP <2952704891@qq.com>
Via
Web form
Xing-Hao Luo, Chen-Wei Wang, Shao-Lin Xiong, Yue Huang (IHEP) report on behalf of GECAM team:
GECAM-B was triggered in-flight by GRB 260103A, at 2026-01-03T01:46:53.950 UTC (denoted as T0), which is also detected by SVOM/GRM (Chen-Wei Wang et.al., GCN #43314).
According to the GECAM-B light curves in about 70-6000 keV, this burst mainly consists of multiple pulses with a duration (T90) of 9.0 +7.0/-3.6 s.
The GECAM-B light curve can be found here:
https://www.bursthub.cn//admin/static/gecambgrb260103A.png
GECAM-B on-ground localization of this burst is (J2000):
Ra: 269.0 deg
Dec: 46.7 deg
Err: 4.6 deg (1-sigma, statistical only)
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).