{
  "eventType": [
    "GRB",
    "Optical Transient"
  ],
  "subject": "GRB 260918A: LCO optical upper limits",
  "format": "text/plain",
  "body": "S. J. Yin, Y. X. Guan, Y.Y. Shi (GXU), A. Saccardi (CEA/Irfu), C. Wu, L.P. Xin (NAOC), Y. Wang (UCB; PMO), Y. Cheng (YNU), report on behalf of the SVOM mission team:\n \nWe observed the field of GRB 260918A (SVOM burst-id sb26091801) detected by SVOM (Zhao et al., GCN 45619) with the LCO 1m telescope at Teide Observatory equipped with the Sinistro instrument.\n \nOur observation started on 2026-09-18 at 04:00:15.482 UT (about 12.3 min after the trigger) and we obtained 3x200 s exposures in the SDSS r and 3x200 s exposures in the Pan-STARRS z filters.\n \nIn the stacked image, we do not detect any new source within the SVOM/ECLAIRs error box, which is consistent with Méndez et al. (GCN 45620). We measure the following upper limits calibrated against the Pan-STARRS DR1 catalog, and not corrected for Galactic extinction:\n \nr > 22.1 AB (5-sigma, mid-time 17.76 min after the trigger);\nz > 20.3 AB (5-sigma, mid-time 25.92 min after the trigger).\n \nThis project is funded by the SVOM collaboration.",
  "circularId": 45622,
  "submittedHow": "web",
  "submitter": "SVOM_group <svomgroup@bao.ac.cn>",
  "createdOn": 1789712678888,
  "eventId": "GRB 260918A"
}