{
  "bibcode": "2020GCN.28871....1B",
  "body": "S. Belkin (IKI), A. Kusakin (FAP), N. Pankov (HSE), I. Reva (FAP), A. \nPozanenko (IKI) report on behalf of GRB-IKI-FuN:\n\nWe continued observations of the  GRB 201104B (Sbarufatti et al., GCN \n28825) with Zeiss-1000 1-m telescope of Tien Shan Astronomical \nObservatory starting on Nov. 06 (UT) 15:04:58.\n\nThe optical afterglow (Marshall et al., GCN 28827; Vielfaure  et al., \nGCN 28840; Oates  et al., GCN 28851; Belkin et al., GCNs 28852, 28856; \nGupta et al., GCN 28860; Hosokawa et al., GCN 28870) at redshift z = \n1.954 (Vielfaure et al., GCN 28840) is detected in stacked image in \nR-filter. Preliminary photometry of the afterglow is following.\n\nDate       UT start t-T0    Filter  Exp.  OT    Err. UL(3 sigma)\n                     (mid, days)     (s)\n\n2020-11-06 15:04:58 1.92271  R      50*90 22.20 0.21 22.4\n\nThe photometry is based on nearby USNO-B1.0 stars.\n\nUSNO-B1.0_id R2\n0979-0003163 17.51\n0979-0003223 17.47",
  "circularId": 28871,
  "createdOn": 1604926652000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 201104B: continued TSHAO optical observation",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 201104B"
}