{
  "submittedHow": "web",
  "body": "A. Volnova (IKI), E. Klunko (ISTP), I. Reva (FAI), A. Pozanenko (IKI), A. Moskvitin (SAO RAS), N. Pankov (IKI) report on behalf of IKI-GRB-FuN:\n \nWe observed the field of the GRB 260914A detected by SVOM/ECLAIR (Wang et al., GCN 45562) and Fermi/GBM (Hamburg, GCN 45569) at z = 0.778 (Saccardi et al., GCN 45579) with the AZT-33IK 1.5m telescope of the Sayan Solar Observatory (Mondy), and the Zeiss-1000 1m telescope of the Tien-Shan Observatory (TSHAO) taking several frames in R-band. The observations at Mondy started on Sep. 14 (UT) 14:51:19 (i.e., ~3.5h after the trigger), followed by the observations at TShAO starting on Sep. 14 (UT) 19:06:53 (i.e., ~8h after the trigger).\n \nThe optical/NIR counterpart (Akl et al., GCN 45564; Palmerio et al., GCN 45565; Li et al., GCN 45566; Shi et al., GCN 45567; Saccardi et al., GCN 45568; Saccardi et al., GCN 45579; Yang et al., GCN 45582; Brivio et al., GCN 45583) is detected in the stacked frames of both observatories.\nThe photometry and observational details are the following:\n \nDate        UT start  t-T0      Exp,    Filter Obj    Err   UL      Site/Telescope\n                     (mid,days) (n*s)                      (3sigma)\n2026-09-14  14:51:19  0.17348   18*120  R      21.14  0.08  22.4    Mondy/AZT-33IK\n2026-09-14  19:06:53  0.37395   68*90   R      21.29  0.19  22.1    TShAO/Z1000  \n \nThe preliminary photometry (Vega) is based on nearby PS1 stars (Lupton 2005 transformation) and not corrected for the Galactic extinction.\n \nThe photometry of the source is affected by the underlying host galaxy reported by Saccardi et al. (GCN 45579) with Legacy survey magnitudes g=22.91, r=22.08, z=21.39.",
  "eventType": [
    "GRB",
    "Optical Transient"
  ],
  "eventId": "GRB 260914A",
  "format": "text/plain",
  "submitter": "Alina Volnova at IKI RAS <alinusss@gmail.com>",
  "createdOn": 1789574426598,
  "circularId": 45595,
  "subject": "GRB 260914A: Mondy and TShAO optical observations"
}