{
  "bibcode": "2020GCN.29210....1B",
  "body": "S. Belkin (IKI), A. Pozanenko (IKI),  M. Krugov (FAI), P. Levkina \n(INASAN), E. Klunko (ISTP), N. Pankov (IKI, HSE)   report on behalf of \nGRB IKI FuN:\n\nWe observed   GRB 201216C (Beardmore et al., GCN  29061)  with \nZeiss-1000 (West) telescope of TSHAO, Zeiss-2000 telescope of Terskol \nobservatory, and AZT-33IK telescope of Mondy observatory.  The optical \nafterglow (Izzo et al., GCN  29066; Jelinek  et al., GCN 29070; Oates et \nal., GCN 29071; Shrestha et al., GCN  29085) at possible redshift of z = \n1.1  of presumably optically dark GRB (Vielfaure et al., GCN 29077) is \nnot detected in our observations. Preliminary photometry of the field is \nfollowing.\n\nDate       UT start  t-T0     Filter Exp.  OT   Err. UL.  Telescope\n                      (mid, days)      (s)\n\n2020-12-17 14:20:49  0.6968    R  60*180   n/d  n/d  19.8 Zeiss-1000(W)\n2020-12-18 16:47:27  1.7653    R  28*180   n/d  n/d  21.9 Zeiss-2000\n2020-12-19 12:00:27  2.5681    R  45*120   n/d  n/d  22.1 AZT-22\n\nPhotometry is based on USNO-B1.0 stars\nUSNO-B1.0_id R2\n1065-0011134 15.33\n1065-0011173 15.44\n1064-0011283 16.67",
  "circularId": 29210,
  "createdOn": 1609436633000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 201216C: TSHAO, Terskol, Mondy optical upper limits",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 201216C"
}