{
  "body": " N. Pankov (HSE,IKI), V. Rumyantsev (CrAO), A. Pozanenko (IKI), S. Belkin\n(IKI) report on behalf of IKI GRB FuN:\n\nWe observed the field of GRB 240411B (Parsotan et al., GCN 36063; Goad et\nal., GCN 36065; D'Avanzo et al., GCN 36071; Lien et al., GCN 36072) with\nZTSh 2.6m telescope of CrAO observatory starting on 2024-04-11 (UT)\n21:18:47. We detect optical afterglow (Izzo et al. GCN 36064; Schneider et\nal. GCN 36067; Ror et al. GCN 36069; Ugarte Postigo et al. GCN 36074; Aryan\net al. GCN 36077).\n\nPreliminary photometry of the afterglow in a combined image is following\n\nDate UT start t-T0 Filter Exp. OT err UL(3sigma)\n(mid, days) (s)\n2024-04-11 21:18:47 0.283257 R 60*120 22.40 0.25 22.8\n\nThe photometry is based on several nearby USNO-B1.0 (R2) stars\nUSNO-B1.0\n",
  "bibcode": "2024GCN.36078....1P",
  "circularId": 36078,
  "createdOn": 1712994131682,
  "eventId": "GRB 240411B",
  "submittedHow": "email-legacy",
  "submitter": "Alexei Pozanenko at IKI, Moscow <grb.alex@gmail.com>",
  "subject": "GRB 240411B: CrAO/ZTSh optical observations"
}