{
  "circularId": 35014,
  "createdOn": 1699894633801,
  "body": "\nTian-Rui Sun, Tian-Ci Zheng, Hui-Yang Mao, Jiang-Tao Li report:\n\nFollowing the detection of GRB 231111A by SWIFT (Melandri et al., GCN 34981; Osborne et al., GCN 34991;GCN 34995), MASTER (Lipunov et al., GCN 34980; GCN 34983), Nanshan/HMT (Jiang et al., GCN 34982), GIT (Kumar et al., GCN 34984), YAHPT (Sun et al., GCN 34985), GECAM (Zhang et al., GCN 34990; GCN 34993), Mondy (Pankov et al., GCN 34994), Terskol Zeiss-2000 (Pankov et al., GCN 34996), Nastro Verde (Dainotti et al., GCN 34997), GMG (Mao et al., GCN 34999; GCN 35001), Mephisto (Sun et al., GCN 35002), Leavitt (Moretti et al., GCN 35003), NUTTelA-TAO (Komesh et al., GCN 35004) and Xinglong-2.16m (Jiang et al., GCN 35012), we conducted observations using the MDM 2.4m Hiltner telescope with the clear filter.\n\nThis observation began from 2023-11-12T01:44:16.415, about 11.4 hours after the burst.\n\nThe PSF photometry results are shown as :\n----------------------------------------------------\nUT                       exposure  filter mag        magerr\n------------------------------------------------------\n2023-11-12T01:44:16.415  600       Clear 20.7669 +/- 0.0622\n2023-11-13T01:35:18.404  600       Clear 22.1815 +/- 0.0697\n------------------------------------------------------\n\n\nWe used the GAIA-DR3 catalogue (G mag) as the magnitude reference for calibration.\n\n\n\n",
  "subject": "GRB231111A: MDM 2.4m Hiltner Telescope Observation",
  "eventId": "GRB 231111A",
  "bibcode": "2023GCN.35014....1S",
  "submittedHow": "email-legacy",
  "submitter": "Tianrui Sun at Purple Mountain Obs,CAS <trsun@pmo.ac.cn>"
}