{
  "circularId": 45555,
  "subject": "GRB 260907A: SVOM/GRM observation",
  "createdOn": 1789219130187,
  "body": "SVOM/GRM team: Jin-Ye Luo, Chen-Wei Wang, Yue Wang, Zheng-Hang Yu, Shi-Jie Zheng, Yue Huang, Shao-Lin Xiong, Shuang-Nan Zhang (IHEP)\n\nSVOM/ECLAIRs team: Stéphane Schanne (CEA)\n\nReport on behalf of the SVOM team:\n\nSVOM/GRM was triggered in-flight by GRB 260907A at 2026-09-07T00:28:02.000 (T0), which is also detected by Fermi/GBM (Fermi GBM Team, GCN 45523) and Glowbug (Cheung et al., GCN 45530).\n\nWith the event-by-event data downloaded through the X-band ground station, the GRM light curve shows that this burst consists of multiple peaks with a T90 of 0.6 +0.4/-0.1 s in the 15-5000 keV band.\n\nThe SVOM/GRM light curve can be found here:\nhttps://www.bursthub.cn/gcn/2026/svgrb260907A.png\n\nIn addition, the position of this burst, as determined by Fermi/GBM (RA = 22.4 deg, Dec = -39 deg, Error = 8.4 deg, GCN #45523), is located at about 40 degrees from the SVOM optical axis, which is inside the ECLAIRs field of view, but at the time of the burst ECLAIRs was not acquiring data.\n\nWith this localization, the time-averaged spectrum from T0-0.2 to T0+0.4 s is best fitted by a power law function. The power law index is -1.30 +/-0.04. The event fluence (10-1000 keV) in this time interval is (7.56 +0.95/−1.09)E-07 erg/cm^2. \n\nThe 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.\n\nThe SVOM/GRM point of contact for this burst is: Jin-Ye Luo (IHEP) (luojy@ihep.ac.cn)",
  "format": "text/plain",
  "submitter": "Jin-Ye Luo <jy_luo2002@163.com>",
  "eventType": [
    "GRB",
    "X-ray Transient"
  ],
  "eventId": "GRB 260907A",
  "submittedHow": "web"
}