{
  "eventId": "GRB 260903A",
  "subject": "GRB 260903A: SAO RAS optical observations",
  "body": "A. Moskvitin (SAO RAS), O. Spiridonova (SAO RAS), A. Pozanenko (IKI),\nA. Volnova (IKI), N. Pankov (IKI) report on behalf of GRB follow-up team\n\nWe observed the field of the GRB 260903A discovered by the SVOM\n(Brunet et al., GCN 45499), also followed by EP (Li et al., GCN 45510)\nwith the Zeiss-1000, 1-m SAO RAS telescope + new CCD photometer.\nA set of 16 x 300 sec images in Rc band were obtained\non September 3, 19:58:07--21:32:51 (mid. time = 8.1358 hours).\n\nThe OT (Li et al., GCN 45504; Saccardi et al., GCN 45505; Malesani\net al., GCN 45508; Russeil et al., GCN 45509) is clearly detected\nin our stacked image. Details of the observation are the following.\n\nDate,      UTstart, t-T0,   Exp., Filter, Mag,     Err.,     UL\n                    (mid,d) (n*s)                          (3-sigma)\n\n2026-09-03 19:58:07 0.33899 16*300 Rc     22.45 +/- 0.09   24.0\n\nThe preliminary photometry (Vega) is based on nearby SDSS stars\n(Lupton 2005 transformation) and not corrected for Galactic extinction.\n\n\n_____________________________________________\nAlexander Sergeevich Moskvitin, Ph. D., researcher,\nOptical Transient Physics Laboratory (#523), SAO RAS,\n369167, Nizhnij Arkhyz, Karachai-Cherkessia, Russia,\n+7(928)3946958, mosk@sao.ru\n",
  "circularId": 45515,
  "createdOn": 1788534092429,
  "submittedHow": "email",
  "submitter": "Alexander Moskvitin at SAO RAS <mosk@sao.ru>"
}