{
  "bibcode": "2013GCN.14864....1R",
  "body": "V. Rumyantsev (CrAO), N.Pit' (CrAO), ��. Volnova (IKI), A. Pozanenko (IKI) \nreport on behalf of  larger GRB  follow-up collaboration:\n\nWe observed the field of  the Swift GRB 130606A (Ukwatta  et al., GCN \n14781) with  AZT-11 telescope of CrAO observatory  starting on  June 06\n(UT) 21:59:60. We took  several images in R-filter of 180 s exposure. The \nafterglow (Jelinek et al., GCN 14782; Xu et al.,  GCN 14783; Nagayama et \nal., GCN 14784)   is not detected in a combined image.   A photometry  is \nbased  on the same SDSS stars we used  in GCN 14806:\n\nStart         T0+,        Filter   Exposure,   OT,        UL (3 sigma)\nUT             mid, d                 (s)\n\n21:59:60  0.0489    R        10x180      n/d         20.7",
  "circularId": 14864,
  "createdOn": 1370909922000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 130606A: CrAO optical upper limit",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 130606A"
}