{
  "bibcode": "2016GCN.19102....1M",
  "body": "E. Mazaeva (IKI), A. Kusakin (Fesenkov Astrophysical Institute), I. Reva \n(Fesenkov Astrophysical Institute), A. Volnova (IKI), A. Pozanenko (IKI) \nreport on behalf of larger GRB follow-up collaboration:\n\nWe observed the Swift GRB 160225A (Siegel et al., GCN 19075) with \nZeiss-1000 (West, East) 1-m telescopes of Tien Shan Astronomical \nObservatory. We obtained several images in R filter starting on Feb. 25 \n(UT) 14:45:56. In the first images we do not detect any optical source \n(Mazaeva et al., GCN 19078). In combine images we detect afterglow \n(Yoshiiet al., GCN 19080; Kuroda  al., GCN 19081; Wiersema al., GCN \n19082).  Preliminary photometry of combined images is following\n\nDate       UT start   t-T0    Filter  Exp.   OT     Err.  UL\n                       (mid, days)     (s)\n\n*2016-02-25 14:45:56   0.07022 R       87*90 20.75    0.16  21.4\n  2016-02-25 15:30:59   0.09576 R       77*90 21.36    0.20  21.9\n  2016-02-25 17:58:10   0.18146 R       52*90  n/d     n/a   21.7\n\n*) Zeiss-1000 West telescope observations\n\nPhotometry is based on SDSS-DR9 nearby stars\nSDSS-DR9_id            R(Lupton)\nJ105614.20+533500.1    15.35\nJ105714.63+533304.9    14.36\nJ105658.91+533304.1    15.77",
  "circularId": 19102,
  "createdOn": 1456609461000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 160225A: TSHAO optical afterglow detection",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 160225A"
}