{
  "submitter": "Rui-Zhi Li at Yunnan Observatories, CAS <liruizhi@ynao.ac.cn>",
  "format": "text/plain",
  "eventId": "GRB 261113A",
  "body": "R.-Z. Li, B.-T. Wang, F.-F. Song, J. Mao, J.-G. Wang and B. Wang (YNAO, CAS) report:\n\nWe observed the field of GRB 261113A (Saccardi et al., GCN 46244, T0 at 2026-11-13T14:31:02) using the GMG-2.4m telescope at the Lijiang Observatory. \nThe observation began at 2026-11-13T15:23:45, about 0.88 hours after the trigger.\n\nThe optical counterpart (Lin et al., GCN 46247; Lei et al., GCN 46248) was well detected in our r-band image.\n\nThe preliminary analysis results are shown as follows:\n\n   Start time [UTC]       Exposure [s]    Tmid-T0 [h]    Filter    AB Magnitude    5-sigma U.L.\n-----------------------  --------------  -------------  --------  --------------  --------------\n2026-11-13 15:23:45.073       300            0.92          r       19.39 ± 0.02        22.3 \n\nThe given magnitudes are derived based on calibration against Pan-STARRS field stars, and are not corrected for the expected Galactic foreground extinction, corresponding to a reddening of E(B-V) = 0.052 mag in the direction of the optical counterpart (Schlafly & Finkbeiner 2011).",
  "createdOn": 1794587795242,
  "submittedHow": "web",
  "eventType": [
    "GRB",
    "Optical Transient"
  ],
  "subject": "GRB 261113A: GMG Optical Observation",
  "circularId": 46249
}