{
  "bibcode": "2015GCN.17718....1M",
  "body": "E. Mazaeva (IKI),  A. Stepura (UAFO, ISON),  A. Matkin (UAFO, ISON), A. \nVolnova (IKI), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of \nlarger GRB follow-up collaboration:\n\nWe observed the field of the GRB 150413A (Markwardt  et al., GCN 17688) \nwith SANTEL-650 (0.65m)  telescope of UAFO/ISON-Ussuriysk observatory \nsstarting on Apr., 14 (UT) 11:48:05.   The afterglow   (Ivanov et al., GCN \n17689) is clearly detected in a combined image. Preliminary photometry the \nunfiltered combined image  is following\n\nDate            UT start   t-T0        Filter     Exp.     OT      OT_err\n                                 (mid, days)          (s)\n\n2015-04-14  11:48:05  0.95859   none     117*60  20.35   0.15\n\nThe photometry is based on nearby USNO-B1.0  stars",
  "circularId": 17718,
  "createdOn": 1429306394000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 150413A: ISON-Ussuriysk optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 150413A"
}