TITLE: GCN CIRCULAR NUMBER: 44285 SUBJECT: GRB 260411B: GECAM-B observation of a long burst DATE: 26/04/13 10:33:45 GMT FROM: xueyuan zao <zaoxueyuan@gmail.com> Xue-Yuan Zao, Chen-Wei Wang, Chao Zheng, Shao-Lin Xiong (IHEP) report on behalf of GECAM team: GECAM-B was triggered on-ground by GRB 260411B, at 2026-04-11T08:04:42.550 UTC, which is also detected by Fermi/GBM (Fermi GBM team, GCN #44262 and #44266), SVOM/GRM (Chen-Wei Wang et al., GCN #44268) and Feimi/LAT (F. Longo et al., GCN#44277). According to the GECAM-B light curves in about 70-6000 keV, this burst mainly consists of two emission episodes with a total duration (T90) of 18.8 +3.8/-2.0 s. The GECAM-B light curve can be found here: https://www.bursthub.cn//admin/static/gecambgrb260411B.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). View this GCN Circular online at https://gcn.nasa.gov/circulars/44285. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...