{
  "bibcode": "2020GCN.27257....1B",
  "body": "S. Belkin (IKI), A. Pozanenko (IKI), E. Klunko (ISTP), E. Mazaeva (IKI), \nA. Volnova (IKI) report on behalf of IKI-GRB-FuN:\n\nWe observed the field of GRB 200227A (Fermi GBM Team et al., GCN 27233; \nLaha et al., GCN 27234) with AZT-33IK telescope of Sayan observatory \n(Mondy) starting on Feb. 27 (UT) 12:47:07.  Within enhanced Swift-XRT \nposition of afterglow (Beardmore et al., GCN 27243) we did not detect \noptical\n  afterglow in agreement with previously reported non-detection (Oeda et \nal., GCN 27236;  Oates et al., GCN 27244). Preliminary photometry of the \nfield is following.\n\nDate UT start,      t-T0    Filter Exp.   OT UL(3sigma)\n                      (mid, days)    (s)\n2020-02-27 12:47:07 0.24582  R   27*120 n/d 23.2\n\nPhotometry is based on the SDSS-DR12 nearby stars (Lupton���s transformation)\nSDSS-DR12_id        R(Lupton)\nJ034542.04+092727.3 18.56\nJ034546.87+092955.7 17.19\nJ034534.13+092646.2 17.32",
  "circularId": 27257,
  "createdOn": 1582900250000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 200227A: Mondy optical upper limit",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 200227A"
}