{
  "bibcode": "2020GCN.28505....1P",
  "body": "A. Pozanenko (IKI), S. Belkin (IKI), A. Volnova (IKI), P. Minaev (IKI), \nN. Pankov (HSE)  report on behalf GRB IKI FuN collaboration:\n\nWe observed the field of GRB 200922A (Moss et al., GCN 28471) with \nRC-1000 Chilescope observatory  in r'-filter starting on 2020-09-22 (UT) \n23:25:05. In a single obtained image of 1200 s exposure we cannot \nresolve the OT reported earlier (Moss et al., GCN 28471; Izzo et al., \nGCN 28478; Siegel  et al., GCN 28482; Malesani et al., GCN 28492). \nInstead we subtract the flux of nearby star from SkyMapper DR1.1 from \nthe (nearby star + OT) photometry.\nPreliminary photometry of the OT after the above-mentioned procedure is \nfollowing.\n\nDate       UT start  t-T0    Filter Exp.  OT(AB) Err.  UL(AB)\n                     (mid, days)     (s)\n\n2020-09-22 23:25:05  0.478   r'     1200  18.92  0.05  20.7\n\nThe photometry is based on nearby SkyMapper DR1.1  stars.",
  "circularId": 28505,
  "createdOn": 1601137100000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 200922A: Chilescope optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 200922A"
}