{
  "bibcode": "2016GCN.19947....1M",
  "body": "E. Mazaeva (IKI), A. Pozanenko (IKI), E. Klunko (ISTP), A. Volnova \n(IKI), I. Korobtsev (ISTP)  report on behalf of larger GRB follow-up \ncollaboration:\n\nWe observed the field of the Fermi GRB 160925A (trigger #496473540) with \n  AZT-33IK telescope of Sayan observatory (Mondy) starting on Sep., 26 \n(UT) 14:38:09. We obtained several images in R-filter. We  clearly \ndetected optical transient (Lipunov et al., GCN 19938; Guidorzi et al., \nGCN  19939). Preliminary photometry  of the transient is following\n\nDate        UT start   t-T0      Filter Exp.   OT        UpLim (3 sigma)\n                        (mid, days)       (s)\n2016-09-26  14:38:09   0.88014    R      30*120 16.06+/-0.03  23.0\n\n\nPhotometry is based on nearby USNO-B1.0 stars\n\nUSNO-B1.0 R2\n0750-0813972 16.86\n0750-0813954 17.70\n0750-0813947 17.78",
  "circularId": 19947,
  "createdOn": 1474979646000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 160925A/MASTER optical transient: Mondy optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 160925A"
}