{
  "bibcode": "2017GCN.21237....1V",
  "body": "A. Volnova (IKI),  A. Pozanenko (IKI), V. Agletdinov (KIAM),  E. Mazaeva \n(IKI), A. Mokhnatkin (KIAM),   I. Molotov (KIAM)  report on behalf of \nlarger GRB follow-up collaboration:\n\nWe observed the field of GRB 170607A (D���Ai et al., GCN 21214) with K-800 \n(0.8m) telescope  of ISON/Terskol   observatory starting  on June, 08 \n(UT) 23:23:04, about 1 day after the burst onset.  We obtained several \nunfiltered images of 20 s exposure. The optical afterglow (D���Ai et al., \nGCN 21214; Heintz  et al., GCN 21217; Lipunov et al., GCN 21220)  is \nstill bright and clearly visible in a combined image. Preliminary \nphotometry of the afterglow is following\n\n\nDate       UT start  t-T0   Filter  Exp.   OT    Err. UL\n                      (mid, days)     (s)\n\n2017-06-08 22:21:31 1.01959 CR      128*20 18.50 0.28 18.90\n\n\nPhotometry is based on nearby SDSS DR9 stars\nSDSS id                   R_Lupton\nJ002930.50+091415.3       16.314\nJ002920.28+091527.1       15.963\nJ002925.73+091637.7       14.803",
  "circularId": 21237,
  "createdOn": 1497033212000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 170607A: ISON/Terskol optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 170607A"
}