{
  "bibcode": "2013GCN.14756....1E",
  "body": "L. Elenin (KIAM),  V. Savanevych (KNURE),  A. Bryukhovetskiy (NSFCTC),  I. \nMolotov (KIAM), A. Pozanenko (IKI) report on behalf of  larger GRB \nfollow-up collaboration:\n\nWe observed of  the field of  the Swift GRB 130604A (Melandri et al., GCN \n14752)  with 0.45-m telescope of ISON-NM observatory on June. 04 (UT) \n06:56:11, i.e. 105 s after burst trigger. Series of 30 s and 60 s exposures \nwere obtained in clear filter. In the combined image of the first 3 images \nwe do not detect afterglow candidate (Perley, GCB 14753).  Preliminary \nphotometry  is based  on the USNO-B1.0 (R2)  nearby  stars:\n\nUT start,      T0+        Exposure,  OT,              UL (3 sigma)\n                   days      s\n\n06:56:11       0.0019  3x30           n/d              19.7",
  "circularId": 14756,
  "createdOn": 1370339301000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 130604A: ISON-NM optical upper limit",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 130604A"
}