{
  "createdOn": 1789445642876,
  "eventType": [
    "GRB",
    "Optical Transient"
  ],
  "eventId": "GRB 260915A",
  "body": "S.J. Yin (GXU),C. Wu, L.P. Xin (NAOC),D. Turpin (CEA/Irfu), A. Saccardi (CEA/Irfu), W. Tan (IHEP), Y. N. Ma (NAOC) report on behalf of the SVOM mission team:\n \nWe observed the field of GRB 260915A (SVOM burst-id sb26091501） detected by SVOM (Liang et al., GCN 45570) with the LCO 1m telescope at Cerro Tololo Observatory and Teide Observatory equipped with the Sinistro instrument.\n \nOur observation started on 2026-09-15 at 01:42:33 UT (about 30.5 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. We measure the following upper limit calibrated against the  Pan-STARRS DR1 catalog, and not corrected for Galactic extinction:\n\nr > 21.1 AB (5-sigma, mid-time 35.9 min after the trigger);\nz > 20.5 AB (5-sigma, mid-time 1.37 hr after the trigger).\n \nThis project is funded by the SVOM collaboration.",
  "circularId": 45573,
  "subject": "GRB 260915A: LCO optical upper limits",
  "submitter": "SVOM_group <svomgroup@bao.ac.cn>",
  "submittedHow": "web",
  "format": "text/plain"
}