{
  "submitter": "SVOM_group <svomgroup@bao.ac.cn>",
  "submittedHow": "web",
  "eventId": "GRB 261108A",
  "format": "text/plain",
  "createdOn": 1794110539341,
  "eventType": [
    "GRB",
    "Optical Transient"
  ],
  "subject": "GRB 261108A: LCO optical upper limits",
  "circularId": 46190,
  "body": "Y.X. Guan, Y.Y. Shi(GXU), A. Saccardi, D. Turpin (CEA/Irfu),  C. Wu , L.P. Xin,(NAOC), S.J. Yin(GXU), X.H. Han(NAOC), Y.D. Hu(GXU), Clara Plasse(HKU),\n report on behalf of the SVOM mission team:\n\nWe observed the field of GRB 261108A (detected by SVOM burst-id sb26110802\n (Xie et al., GCN 46186) with the LCO 1m telescope at Cerro Tololo Inter-American Observatory equipped with the Sinistro instrument.\n\nOur observation started on 2026-11-08T01:17:20 UTC (about 4.2 min after the trigger) and we obtained 3x200 s exposures in the SDSS r filter 3x200 s exposures in the Pan-STARRS z 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 Pan-STARRS DR1 catalog, and not corrected for Galactic extinction:\n\nr > 22.6  AB (5-sigma, mid-time 9.6 min after the trigger);\nz > 20.5  AB (5-sigma, mid-time 34.8 min after the trigger).\n\nThis project is funded by the SVOM collaboration."
}