{
  "bibcode": "2021GCN.31018....1B",
  "body": "S. Belkin (IKI), A. Pozanenko (IKI), E. Klunko (ISTP), N. Pankov (HSE), \n  report  on behalf of GRB IKI FuN:\n\nWe observed the GRB 211023A (Fermi GBM team, GCN  30958) with AZT-33IK \ntelescope of Sayan observatory (Mondy)  starting on 2021-10-26  (UT) \n14:47:57.  We obtained 17 images in R-filter. The afterglow   of the GRB \n211023A (Lipunov   et al., GCN  30977;  Kann  et al. GCN 30982; Hu et \nal. GCN 30990; Belkin et al., GCN 31004) is clearly detected. \nPreliminary photometry of the afterglow in a stacked image is following\n\nDate       UT start   t-T0       Filter Exp.   OT    Err.  UL(3sigma)\n                     (mid, days)        (s)\n\n2021-10-26 14:47:57  3.09182    R      30*120  20.57 0.06  22.7\n\n\nThe photometry is based on the nearby USNO-B1.0 stars\nRA DEC R2\n04:53:23.10336 +85:19:26.4720 14.09\n04:52:47.26344 +85:22:52.1508 15.75",
  "circularId": 31018,
  "createdOn": 1635426300000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 211023A: continued Mondy optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 211023A"
}