{
  "bibcode": "2021GCN.29270....1P",
  "body": "A. Pozanenko (IKI), S. Belkin (IKI), V. Kim (FAI, Pulkovo Observatory), \n  M. Krugov (FAI)  report on behalf of GRB IKI FuN:\n\nWe continued observations of  XRT candidate (Burrows  et al., GCN 29230) \nof MAXI GRB 210102B (Guo et al., GCN 29223) with AZT-20 telescope of \nAssy-Turgen observatory starting on  Jan. 05 (UT) 13:00:53, i.e.  ~3.2 \ndays after trigger.  At the place of the only one of XRT candidate \n(Burrows  et al., GCN 29230)  we do not detect the optical object found \nearly (Pozanenko et al., GCN 29240).\nPreliminary photometry of the field is following\n\nDate       UT start  t-T0    Filter    Exp.   OT  Err.  UL (3sigma)\n                      (mid, days)      (s)\n\n2021-01-05 13:00:53   3.20177   r'(AB) 76*60  n/d n/d   23.1\n\nThe photometry is based on the stars of PanSTARRS-PS1\nRA DEC r'\n23:35:20.67802 -21:04:16.4688 19.656\n23:35:47.99017 -21:11:53.6544 17.807\n\nWe confirm the optical object reported in GCN 29240 as an afterglow of \nGRB 210102B.",
  "circularId": 29270,
  "createdOn": 1609948515000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 210102B: Assy optical afterglow identification",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 210102B"
}