{
  "format": "text/plain",
  "subject": "GRB 260604C: further SAO RAS optical observations",
  "submitter": "Alexander Moskvitin at SAO RAS <mosk@sao.ru>",
  "eventId": "GRB 260604C",
  "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 long GRB 260604C discovered by Fermi\n(The Fermi GBM team, GCN 44822; Neights & Meegan, GCN 44831);\nSVOM (Gotz et al., GCN 44823) and GECAM-B (Luo et al., GCN 44854)\nwith the Zeiss-1000 1-m telescope of SAO RAS equipped with the CCD\nphotometer. We obtained 12 x 300 sec. images in Rc band on June 08,\n20:01:14--21:07:58 UT.\n\nThe OT (Lipunov, GCN 44827; Konno et al., GCN 44828; GCN 44836;\nZhu et al., GCN 44832; Becerra et al., GCN 44834; Hellot et al.,\nGCN 44835; Gompertz et al., GCN 44837; Gompertz et al., GCN 44843;\nChen et al., GCN 44851; Moskvitin et al., GCN 44852; Sasaki et al.,\nGCN 44857; Pankov et al., GCN 44858; Pankov et al., GCN 44862;\nBurkhonov et al., GCN 44865; Lincetto et al., GCN 44873)\nis detected in our stacked image with the following brightness:\n\nDate       UTstart  t-T0    Exp.   Filter Mag +/- Err.    UL\n                    (mid,d) (n*s)                         (3-sigma)  \n2026.06.08 20:01:14 4.01102 12*300 Rc     23.08 +/- 0.18  23.8\n\nThe preliminary photometry is based on nearby SDSS stars (R-magnitudes\nwere obtained using Lupton 2005 transformation equations)\nas in Moskvitin et al., GCN 44852, and was not corrected\nfor the Galactic extinction.",
  "circularId": 44877,
  "submittedHow": "web",
  "createdOn": 1780957663186
}