TITLE: GCN CIRCULAR NUMBER: 44450 SUBJECT: SVOM/GRM observation of a bright burst from SGR 1E1841-045 DATE: 26/05/03 16:26:46 GMT FROM: xueyuan zao <zaoxueyuan@gmail.com> SVOM/GRM team: Xue-Yuan Zao, Chen-Wei Wang, Shi-Jie Zheng, Yue Huang, Shao-Lin Xiong, Shuang-Nan Zhang (IHEP) SVOM/ECLAIRs team: Hui Yang, Sebastien Guillot (IRAP) Report on behalf of the SVOM team: SVOM/GRM detected a bright burst from SGR 1E1841-045 at 2026-05-02T05:39:51.950 UTC (T0), which is also detected by Konus-Wind (A. Ridnaia el at., GCN#44448). With the event-by-event data downloaded through the X-band ground station, the GRM light curve shows that this burst consists of a single pulse with a T90 of 0.08 +0.08/-0.02 s in the 15-5000 keV band. All the signal is detected below 100 keV. The SVOM/GRM light curve can be found hereļ¼ https://www.bursthub.cn//admin/static/svsgr_260502_053951.png In addition, the localization of SGR 1E1841-045 is located at about 94 degrees from the SVOM optical axis, which is outside the ECLAIRs field of view. The time-averaged spectrum from T0-0.04 to T0+0.07 s is best fitted by a power law function with an exponential high-energy cutoff. The power law index is -0.49 +0.28/-0.27 and the cutoff energy, parameterized as Epeak, is 37.08 +1.88/-2.12 keV. The event fluence (10-1000 keV) in this time interval is (7.29 +0.32/-0.31) E-07 erg/cm^2. The Space Variable Objects Monitor (SVOM) is a China-France joint mission led by the Chinese National Space Administration (CNSA, China), National Center for Space Studies (CNES, France) and the Chinese Academy of Sciences (CAS, China), which is dedicated to observing gamma-ray bursts and other transient phenomena in the energetic universe. GRM is developed by the Institute of High Energy Physics (IHEP) of CAS. The SVOM/GRM point of contact for this burst is: Xue-Yuan Zao (IHEP) (zaoxy@ihep.ac.cn) View this GCN Circular online at https://gcn.nasa.gov/circulars/44450. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...