TITLE: GCN CIRCULAR NUMBER: 43317 SUBJECT: GRB 260103A: GECAM-B observation of a burst DATE: 26/01/04 08:59:17 GMT FROM: Xinghao Luo at IHEP <2952704891@qq.com> GRB 260103A: GECAM-B observation of a burst 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 +3.6/-7.0 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). View this GCN Circular online at https://gcn.nasa.gov/circulars/43317. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...