{
  "bibcode": "2021GCN.30825....1P",
  "body": "N. Pankov (HSE), S. Belkin (IKI), A. Pozanenko (IKI), E. Klunko (ISTP) \nreport  on behalf of GRB IKI FuN:\n\nWe observed the field of GRB 210912A (Troja et al., GCN 30820) with \nAZT-33IK telescope of Sayan observatory (Mondy)  starting on \n2021-09-12(UT) 12:57:48.  We obtained 30 images in R-filter. We confirm \nthe fading object suggested by Hu et al. (GCN 30823) as the optic \nafterglow of GRB 210912A.   Preliminary photometry of the object in \nstacked images is following\n\nDate       UT start   t-T0       Filter Exp.   OT    Err.  UL(3sigma)\n                     (mid, days)        (s)\n\n2021-09-12 12:57:48  0.10112    R     29*120   21.33 0.14  22.5\n\nThe photometry is based on the nearby USNO-B1.0 stars\nRA DEC R2\n08:39:12.26208 +79:12:37.1304 15.88\n08:39:10.94880 +79:16:33.8916 15.26",
  "circularId": 30825,
  "createdOn": 1631467308000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 210912A: Mondy optical afterglow confirmation",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 210912A"
}