TITLE: GCN CIRCULAR NUMBER: 44466 SUBJECT: GRB 260502A: SVOM/GRM observation of a short GRB DATE: 26/05/05 03:09:45 GMT FROM: Xinghao Luo at IHEP <2952704891@qq.com> SVOM/GRM team: Xing-Hao Luo, Chen-Wei Wang, Yue Huang, Shi-Jie Zheng, Shao-Lin Xiong, Shuang-Nan Zhang (IHEP) SVOM/ECLAIRs team: Hui Yang (IRAP) Report on behalf of the SVOM team: SVOM/GRM was triggered on-ground by GRB 260502A at 2026-05-02T05:01:00.300 UTC (T0), which is also detected by Fermi/GBM (Fermi GBM team, GCN #44447). 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 0.61 +0.28/-0.15 s in the 15-5000 keV band. The SVOM/GRM light curve can be found here: https://www.bursthub.cn//admin/static/svgrb260502A.png In addition, the position of this burst, as determined by Fermi/GBM (RA=283.76 , DEC=57.62, with a statistical uncertainty of 13.77 degrees, Fermi GBM team, GCN #44447), is located at about 82 degrees form the SVOM optical axis, which is outside the ECLAIRs field of view. With this localization, the time-averaged spectrum from T0-0.04 to T0+0.01 s is best fitted by a power law function. The power law index is -1.12 +/-0.10. The event fluence (10-1000keV) in this time interval is (2.3 +0.37/-0.33)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 point of contact for this burst is: Xing-Hao Luo (luoxh@ihep.ac.cn) View this GCN Circular online at https://gcn.nasa.gov/circulars/44466. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...