{
  "bibcode": "2013GCN.14806....1V",
  "body": "A. Volnova (IKI), R.Inasaridze (AAO), O. Kvaratskhelia (AAO), V. \nAyvazian(AAO), Yu. Krugly (IA KhNU),  I. Molotov (KIAM), A. Pozanenko \n(IKI)  report on behalf of  larger GRB follow-up collaboration:\n\nWe observed the field of the Swift Swift GRB 130606A (Ukwatta et al., \nGCN 14781)with AS-32 (0.7m) telescope of Abastumani Observatory, \nstarting on Jun. 06 (UT) 21:47:43. We obtained several unfiltered images \nof 180 s exposure. The afterglow (Jelinek et al., GCN 14782; Xu et al., \nGCN 14783; Nagayama et al., GCN 14784) is well detected in  separate \nimages. Preliminary photometry\n\nT_start,   Exp,  T-t0, d    OT +/- err\n  UT        s     mid, days\n21:47:43   180   0.03095    18.84 +/- 0.05\n21:51:24   180   0.03351    18.86 +/- 0.04\n21:55:04   180   0.03605    18.95 +/- 0.05\n21:58:45 2x180   0.03988    19.16 +/- 0.06\n\nis based on SDSS stars R mag, where R mag obtained via transformations \nugriz in BVRI (Lupton, 2005):\n\nSDSS                 u     g       r     i      z       R\nJ163722.96+294541.6 16.747 15.352 14.827 14.598 14.568  14.625\nJ163734.99+294356.8 18.166 17.023 16.665 16.540 16.503  16.493",
  "circularId": 14806,
  "createdOn": 1370611320000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 130606A: AAO optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 130606A"
}