{
  "createdOn": 1765032283159,
  "subject": "GRB 251205A: Zeiss-1000 Koshka observatory optical observations",
  "body": "N. Pankov (HSE,IKI), A. Novichonok (Petrozavodsk State University,\nKIAM), S. Schmalz (KIAM), A. Volnova (IKI), A. Pozanenko (IKI) report\non behalf of IKI GRB-FuN:\n\nWe observed the optical afterglow of GRB 251205A (Lanava et al., GCN\n43005; Lipunov et al., GCN 43006; de Ugarte Postigo et al., GCN 43008;\nMalesani et al., GCN 43009; O'Neill et al., GCN 43010) using the\nZeiss-1000 telescope at Koshka observatory (INASAN). The observations\nstarted/ended on 2025-12-06 (UT) 00:57:28/04:07:07. Preliminary\nphotometry of the initial stacked image is the following\n\nDate UT start t-T0 Exp. Filter OT Err. UL(3sigma)\n(mid, days) (s)\n\n2025-12-06 00:57:28 0.05747 10*90 R  17.92 0.06 20.5\n\nThe photometry is based on nearby USNO-B1.0 stars and not corrected\nfor Galaxy extinction.\n",
  "eventId": "GRB 251205A",
  "circularId": 43012,
  "bibcode": "2025GCN.43012....1P",
  "submitter": "Alexei Pozanenko at IKI, Moscow <grb.alex@gmail.com>",
  "submittedHow": "email"
}