{
  "submitter": "SVOM_group <svomgroup@bao.ac.cn>",
  "submittedHow": "web",
  "format": "text/plain",
  "circularId": 46154,
  "eventType": [
    "GRB",
    "Optical Transient"
  ],
  "createdOn": 1793842227350,
  "body": "S.J. Yin(GXU),D. Turpin,  A. Saccardi , J. T. Palmerio (CEA/Irfu),Y.X. Guan(GXU), C. Wu , L.P. Xin,(NAOC), Y.Y. Shi(GXU), X.H. Han(NAOC), M. Gnaoui (IAP), L.Zhang (IHEP), A. Li (BNU),\n report on behalf of the SVOM mission team:\n\nWe observed the field of GRB 261104A (detected by SVOM burst-id sb26110402\n (Bernardini et al., GCN 46150) with the LCO 1m telescope at South Afican Astronomical Observatory equipped with the Sinistro instrument.\n\nOur observation started on 2026-11-04T21:51:12.583 UTC (about 1.24 hr after the trigger) and we obtained 3x200 s exposures in the SDSS r filter.\n\nIn the stacked image, we do not detect any new source within the SVOM/ECLAIRs error box. We measure the following upper limit calibrated against the DESI DR10 catalog, and not corrected for Galactic extinction:\n\nr > 22.31 AB (5-sigma, mid-time 1.33 hr after the trigger).\n\nThis project is funded by the SVOM collaboration.\n",
  "eventId": "GRB 261104A",
  "subject": "GRB 261104A: LCO optical upper limits"
}