{
  "bibcode": "2021GCN.30530....1P",
  "body": "N. Pankov (HSE, IKI),  R. Ya. Inasaridze (AbAO), A. Pozanenko (IKI), \nS. Belkin (IKI), V. R. Ayvazian (AbAO),  G. V. Kapanadze (AbAO), report \non behalf of GRB IKI FuN:\n\nWe observed  the field of GRB 210725A (Bernardini et al. GCN 30501; \nTorii  et al. GCN 30507; Poolakkil et al. GCN 30519)  with AS-32 \ntelescope of Abastumani observatory (AbAO) in R-filter starting on July, \n25 (UT) 19:11:58. We do not detect any object in the enhanced XRT \nposition (Perri et al. GCN 30517). The non detection is consistent with \noptical observations (Zheng  et al. GCN 30503; Niwano et al., GCN 30509; \nSiegel  et al. GCN 30527).\n\nPreliminary photometry of the field  is following\n\nDate       UT start   t-T0    Filter Exp.    OT   Err.  UL(3sigma)\n                        (mid, days)    (s)\n\n2021-07-25 19:11:58   0.65481  R     36*60   n/d  n/d   20.8\n\nThe photometry is based on the nearby stars:\nUSNO-B1.0 R2\nUSNO_B10_id R2\n0888-00234198 14.31\n0888-00234167 15.25",
  "circularId": 30530,
  "createdOn": 1627368854000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 210725A: AbAO optical upper limit",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 210725A"
}