{
  "subject": "GRB 261026A: Mondy, SAO RAS and Terskol optical observations",
  "eventId": "GRB 261026A",
  "submitter": "Alexander Moskvitin at SAO RAS <mosk@sao.ru>",
  "submittedHow": "email",
  "circularId": 46110,
  "createdOn": 1793365760914,
  "body": "A. Moskvitin (SAO), O. Spiridonova (SAO), E. Klunko (ISTP), D. Andreev\n(INASAN),\nI. Sokolov (INASAN), A. Volnova (IKI), N. Pankov (IKI), A. Pozanenko (IKI),\non behalf of the SAO GRB follow-up team and the IKI-GRB-FuN report.\n\nWe observed the field of GRB 261026A discovered by SVOM (Goto et al., GCN\n46030;\nXie et al., GCN 46068), also detected by EP-FXT (Jiang et al., GCN 46058)\nwith AZT-33IK 1.5-m telescope of the Sayan Solar Observatory (Mondy)\n1-m Zeiss-1000 telescope of SAO RAS and 2-m Zeiss-2000 telescope\nof the Terskol Observatory (INASAN).\n\nThe OT (Dornic et al., GCN 46033; Zheng et al., GCN 46034; Wu et al., GCN\n46035;\nLi et al., GCN 46046; Morín-González et al., GCN 46048; Coyo et al., GCN\n46054;\nMoskvitin et al., GCN 46062; Li et al., GCN 46063; also observed in NIR:\nMohan et al., GCN 46041; Shi et al., GCN 46047; Manyan et al., GCN 46064)\nis detected in our stacked frames. Details of the observation are the\nfollowing.\n\nDate        UT start  t-T0      Exp,    Filter Obj      Err   UL\nObs./Tel.\n                     (mid,days) (n*s)                         (3sigma)\n2026-10-27  13:27:57  1.37418   36*120  R      21.8 +/- 0.2   22.5\nMondy/AZT-33IK\n2026-10-27  17:03:29  1.48441   36*100  Rc     22.0 +/- 0.2   22.6\nSAO/Zeiss-1000\n2026-10-28  19:20:41  2.58316   40*100  Rc     22.7 +/- 0.3   22.7\nSAO/Zeiss-1000\n2026-10-28  20:37:22  2.62112   17*180  R      23.0 +/- 0.3   23.1\nTerskol/Zeiss-2000\n\nThis preliminary photometry (Vega) is based on nearby SDSS stars\n(Lupton 2005 transformation) and not corrected for Galactic extinction.\n"
}