{
  "bibcode": "2016GCN.19605....1M",
  "body": "E. Mazaeva (IKI), A. Kusakin (Fesenkov Astrophysical Institute), P. \nMinaev (IKI), I. Reva (Fesenkov Astrophysical Institute), A. Volnova \n(IKI), A. Pozanenko (IKI) report on behalf of larger GRB follow-up \ncollaboration:\n\nWe observed the field of GRB 160625B (Dirirsa et al., GCN 19580; Burns \net al. GCN 19581) with Zeiss-1000 (East) 1-m telescopes of Tien Shan \nAstronomical Observatory. We obtained several images in R filter \nstarting on June 26 (UT) 19:39:18. We detect optical afterglow of  GRB \n160625B (Troja et al., GCN 19588; Oates  et al., GCN  19589). \nPreliminary photometry of a combined image is following\n\nDate       UT start   t-T0    Filter  Exp.   OT     Err.  UL\n                       (mid, days)     (s)\n\n2016-06-26 19:39:18   0.91784 R       50*120 19.07  0.05  22.0\n\nPhotometry is based on nearby USNO-B1.0 stars\nUSNO-B.1_id  R2\n0969-0608423 16.38\n0969-0608416 16.28\n0969-0608335 15.00\n0969-0608366 16.05\n0969-0608449 17.38\n0969-0608443 16.78\n0969-0608456 16.79\n\nThe GRB 160625B triggered Fermi LAT and GBM (Dirirsa et al., GCN 19580; \nBurns et al. GCN 19581), Konus-Wind (Svinkin et al. GCN 19604) and  D. \nKann (GCN 19579) reported about CALET and SPI-ACS/INTEGRAL trigger.\n\nA light curve of SPI-ACS/INTEGRAL  can be found in\nhttp://grb.rssi.ru/GRB160625B/GRB160625B_API-ACS.png\n\nThe SPI-ACS time profile of  GRB 160625B consists of 3 episodes of total \nduration about 750 seconds and compatible with time profiles reported by \nGBM (Burns, GCN 19581) and Konus-Wind (Svinkin et al. GCN 19604).",
  "circularId": 19605,
  "createdOn": 1467057590000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 160625B: TSHAO optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 160625B"
}