{
  "bibcode": "2016GCN.20340....1M",
  "body": "E. Mazaeva (IKI),  I. Reva (Fesenkov Astrophysical Institute), A. \nKusakin (Fesenkov Astrophysical Institute), A. Volnova (IKI), A. \nPozanenko (IKI) report on behalf of larger GRB follow-up collaboration:\n\nWe observed the field of GRB 161224A  (Swift trigger=728268, \nCholden-Brownet al., GCN 20333) with Zeiss-1000 (East) 1-m telescope of \nTien Shan Astronomical Observatory. We obtained several images in R \nfilter starting on Dec. 25 (UT) 00:13:31 and Dec. 25 (UT) 23:45:12. We \ndo not detect any evident variable source in the BAT ground-calculated \nposition (Ukwatta  al., GCN 20337). Within enhanced XRT position \n(Cholden-Brownet al., GCN 20338) we not detected any source. Preliminary \nphotometry of the field is following\n\nDate       UT start   t-T0   Filter   Exp.   OT   Err.  UL\n                       (mid, days)     (s)\n2016-12-25 00:13:31   0.10201  R      16*180 n/d n/d   21.1\n2016-12-25 23:45:12   1.07646  R      11*180 n/d n/d   20.7\n\n\nPhotometry is based on nearby USNO-B1.0 stars\n0719-0341418 17.14\n0720-0349085 17.50\n0720-0348989 16.94\n0719-0341338 15.94\n\nA finding chart can be found in \nhttp://grb.rssi.ru/GRB161224A/GRB161224A_20161225_TSHAO_fc.png",
  "circularId": 20340,
  "createdOn": 1482757471000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 161224A: TSHAO optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 161224A"
}