{
  "subject": "GRB 261029A: SAO RAS optical observations",
  "submittedHow": "email",
  "eventId": "GRB 261029A",
  "submitter": "Alexander Moskvitin at SAO RAS <mosk@sao.ru>",
  "circularId": 46133,
  "body": "A. Moskvitin (SAO), O. Spiridonova (SAO), A. Volnova (IKI),\nN. Pankov (IKI), A. Pozanenko (IKI), on behalf of the SAO\nGRB follow-up team and the IKI-GRB-FuN report.\n\nWe observed the field of the GRB 261029A discovered by Fermi\n(The Fermi GBM team, GCN 46071; Longo et al., GCN 46085; Scotton,\nGCN 46098), SVOM (Goto et al., GCN 46072; Yu et al., GCN 46096;\nBrunet et al., GCN 46117), AstroSat (Salunke et al., GCN 46089);\nCGBM (Marrocchesi et al., GCN 46095); NuSTAR (Waratkar\nand Grefenstette, GCN 46100); GECAM-B (Yu and Xiong, GCN 46108);\nGlowbug gamma-ray telescope (Cheung et al., GCN 46112);\nalso followed by EP (Kan et al., GCN 46086).\nThe observations carried out with the 1-m telescope of SAO RAS\nZeiss-1000 on 2026-11-01T20:32:25--21:42:39 UT. We obtained\n12 * 300 sec. images in Rc band under good weather conditions.\n\nThe OT (O'Neill et al., GCN 46073; He et al., GCN 46078; Wang et al.,\nGCN 46079; Cotter et al., GCN 46081; Yin et al., GCN 46082; GCN 46084;\nSánchez Álvarez et al., GCN 46083; Shi et al., GCN 46088; Kang et al.,\nGCN 46090; Ma et al., GCN 46092; Novotny et al., GCN 46097; Zhao et al.,\nGCN 46099; Dimple et al., GCN 46101; Novotny et al., GCN 46102;\nRodríguez-Torres et al., GCN 46103; Hua et al., GCN 46104;\nYin et al., GCN 46109; also observed in NIR: De et al.,\nGCN 46080; GCN 46093) is clearly detected in our stacked image\nwith the following brightness.\n\nDate       UT start  t-T0     Exp,    Filter Obj      Err   UL\n                     (mid, d) (n*s)                         (3sigma)\n2026-11-01 20:32:25  3.81978  12*300  Rc     22.85 +/- 0.17 23.6\n\nThis preliminary photometry (Vega) is based on nearby SDSS stars\n(Lupton 2005 transformation) and not corrected for Galactic extinction.\n",
  "createdOn": 1793687143841
}