{
  "eventId": "GRB 251126A",
  "bibcode": "2025GCN.42870....1M",
  "body": "A. Moskvitin (SAO RAS), V. Goranskij (SAI MSU, SAO RAS), \nV. S. Shergin (SAO RAS), A. A. Volnova (IKI), A. S. Pozanenko (IKI)\nreport on behalf of IKI-GRB-FuN and GRB follow-up team.\n\nWe observed the field of the Swift GRB 251126A (Caputo et al., \nGCN 42843; Evans, GCN 42845; Goad et al., GCN 42851; Page et al., \nGCN 42860) with the Zeiss-1000 1m telescope of the SAO RAS \non November 27/28 night. We obtained two series of 300 sec. images\nin Rc band under a good weather conditions and seeing (FWHM) ~1\".5.\n\nThe optical afterglow (Swain, GCN 42844; Fu et al., GCN  42848; \nReguitti et al., GCN 42849; Broens et al., GCN 42850; Anguloet al., \nGCN 42855; Pulido-Torres et al; GCN 42856; Gupta et al., GCN 42857; \nCotter et al., GCN 42858; Seki et al., GCN 42859; Volnova et al., \nGCN 42861; Breeveld and Caputo, GCN 42863; Gupta et al., GCN 42864;\nBurkhonov et al., GCN 42866; Maksut et al., GCN 42868) is clearly \ndetected in the stacked frames. The preliminary results are as \nfollowing.\n\nDate        UT start  t-T0       Exp.    Filter  OT     Err.  UL      \n                     (mid,days)  (n*s)                       (3sigma)\n                     \n2025-11-27  20:20:22  1.07076    11*300  Rc      22.02  0.04  24.1    \n2025-11-27  23:31:00  1.19809     8*300  Rc      22.24  0.07  23.8       \n\n\nThe photometry is based on nearby stars from the USNO-B1 catalogue \n(R2 magnitudes)and is not corrected for the Galactic extinction.",
  "subject": "GRB 251126A: further SAO RAS optical observations",
  "createdOn": 1764333969336,
  "submitter": "Alexander Moskvitin at SAO RAS <mosk@sao.ru>",
  "format": "text/plain",
  "circularId": 42870,
  "submittedHow": "web"
}