{
  "bibcode": "2017GCN.21300....1M",
  "body": "E. Mazaeva (IKI), A. Pozanenko (IKI), V. Agletdinov (KIAM), A. Volnova \n(IKI),  A. Mokhnatkin (KIAM),   I. Molotov (KIAM)  report on behalf of \nlarger GRB follow-up collaboration:\n\nWe observed the field of the Swift GRB 170705A (Starling et al. GCN 21289) \nwhich is also detected by GBM/Fermi and Konus-Wind  (Bissaldi  et al., GCN \n21297; Svinkini et al., GCN 21299) with K-800 (0.8m) telescope  of \nISON/Terskol  observatory starting  on July, 05 (UT) 18:30:54.  We obtained \nseveral unfiltered images of 20 s exposure. The optical afterglow  of GRB \n170705A (Starling et al. GCN 21289, Lipunov et al. GCN 21291, Butler et al. \nGCN 21293, Emery et al. GCN 21294; Ugarte Postigo et al. GCN 21298)  is \nclearly visible in a combined image. Preliminary  photometry of the \nafterglow is following\n\n\nDate       UT start  t-T0                 Filter   Exp.      OT     Err. \nUL\n                      (mid, days)                         (s)\n\n2017-07-05  18:30:54 0.70649 CR      358*20 19.84 0.08 22.2\n\n\nPhotometry is based on nearby SDSS DR9 stars\nSDSS id                          R_Lupton\nJ124702.82+181926.7 17.63\nJ124700.96+181851.9 19.15\nJ124653.35+182058.9 17.08\nJ124641.28+182043.7 16.61\nJ124646.57+181522.1 17.45\nJ124645.71+181510.4 17.18\nJ124650.58+182306.3 18.18\nJ124624.60+181820.0 16.34\nJ124647.75+181330.6 16.05\nJ124644.99+181414.3 18.79",
  "circularId": 21300,
  "createdOn": 1499347681000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 170705A: ISON/Terskol optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 170705A"
}