{
  "bibcode": "2021GCN.30614....1K",
  "body": "V. Kim (FAI, Pulkovo Observatory), A. Pozanenko (IKI), M. Krugov (FAI), \n  N. Pankov (HSE, IKI),  S. Belkin (IKI) report on behalf of GRB IKI FuN:\n\nWe observed the field of  GRB 210610B (Lien et al., GCN 30600) with \nAZT-20 telescope of Assy-Turgen observatory starting on 2021-08-07 (UT) \n20:45:22.\n\nWe clearly detect the optical afterglow (Lien et al., GCN 30600; Hu et \nal., GCN 30602; Lipunov et al., GCN 30607).\n\nPreliminary photometry of the optical afterglow in a stacked image is \nfollowing\n\nDate       UT start  t-T0       Exp.    Filter  OT    Err.  UL(3sigma)\n                    (mid, days)  (s)\n\n2021-08-07 20:45:22  0.47601    75*60   r'      21.28  0.05   23.6\n\nThe photometry is based on nearby PS1 stars.",
  "circularId": 30614,
  "createdOn": 1628400797000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 210610B: Assy optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 210610B"
}