{
  "submittedHow": "email",
  "submitter": "Alexander Moskvitin at SAO RAS <mosk@sao.ru>",
  "circularId": 46279,
  "subject": "GRB 261113A: AZT-20 Assy-Turgen optical observations",
  "createdOn": 1794700104007,
  "eventId": "GRB 261113A",
  "body": "A. Moskvitin (SAO), A. Pozanenko (IKI), M. Krugov (FAI),  A. Volnova (IKI),\nN. Pankov (IKI), O. Spiridonova (SAO) report on behalf of IKI-GRB-FuN\nand SAO GRB follow-up team.\n\nWe observed the field of the GRB 261113A (Saccardi et al., GCN 46244;\nFrederiks et al., GCN 46268; Dagoneau et al., GCN 46270)\nat the redshift of z = 3.580 (Saccardi et al., GCN 46261;\nPerez-Garcia et al., GCN 46264) with the 1.5-m AZT-20 telescope\nof the Assy-Turgen Observatory on 2026-11-14T13:09:44--\n2026-11-14T14:15:32 UT (t_mid - T0 = 0.96639 days).\n\nThe OT (Lei et al., GCN 46248; Li et al., GCN 46249; Yin et al.,\nGCN 46250; Chen et al., GCN 46251; Wu et al., GCN 46252; Zhao et al.,\nGCN 46253; Li et al., GCN 46254; Saikia et al., GCN 46256; Adami et al.,\nGCN 46257; Gress et al., GCN 46258; Izzo et al., GCN 46259; Saccardi et\nal., GCN 46261; Maksut et al., GCN 46262; Moskvitin et al., GCN 46263;\nPerez-Garcia et al., GCN 46264; de Ugarte Postigo et al., GCN 46265;\nDimple et al., GCN 46266; Jelinek et al., GCN 46271; Wei et al.,\nGCN 46274; also observed in NIR: Lin et al., GCN 46247; Brivio et al.,\nGCN 46260) is clearly detected in our stacked image.\nThe results are as follows.\n\nDate       UT start t-T0    Exp,  Filter Obj       Err  UL\n                    (mid,h) (n*s)                       (3sigma)\n2026-11-14 13:09:44 23.1933 58*60 r-SDSS 23.26 +/- 0.12 24.4\n\nThe photometry was calibrated against nearby SDSS stars and\nnot corrected for Galactic extinction.\n"
}