GRB 241030B: SVOM/GRM observation

During the commissioning phase, the SVOM/GRM was triggered in-flight by GRB 241030B at 2024-10-30T18:34:22.000 UT (T0), which was also observed by Fermi/GBM (Fermi GBM team, GCN 37980), Swift/BAT (Klingler et al, GCN 37981), Swift/XRT (Evans et al, GCN 37983) and SVOM/ECLAIRs (Zhao et al, GCN 37984). The real-time alert data and light curves of SVOM/GRM were downlinked to the ground through the VHF system with low latency. 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 6.8 +1.5/-0.5 s. The SVOM/GRM on-ground position is consistent with the SVOM/ECLAIRs on-board localization. The GRM light curve can be found here: https://www.bursthub.cn//admin/static/svgrb241030B.png This burst is located at about 29.4 degrees from the SVOM optical axis. 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: Wen-Jun Tan (IHEP)(tanwj@ihep.ac.cn)