{
  "bibcode": "2013GCN.15244....1K",
  "body": "G. Khorunzhev, R. Burenin, M. Pavlinsky, R. Sunyaev (IKI),\nI. Bikmaev, N. Sakhibullin (KFU/AST), \nI. Khamitov, H.  Kirbiyik (TUG) \n\nreport:\n\nThe optical afterglow of GRB 130831A (GCN 15139, D. Palmer) was\nobserved with 1.5-m Russian-Turkish Telescope RTT150 at Bakyrlytepe\n(TUBITAK National Observatory, Turkey). The observation started at\n2013-09-01 00:42:03 UT, appr. 12 hours after the burst.\n\nTwo images each with exposure 300 seconds were obtained in R-band:\n\n1. UT = 00:42:03.678; t-t0 = 11.630h; m_R = 19.57 +- 0.02\n2. UT = 00:48:35.373; t-t0 = 11.739h; m_R = 19.62 +- 0.03\n \nImages are calibrated using stars proposed by Pozanenko et al. (GCN\n15190). The magnitudes are not corrected for the Galactic extinction.",
  "circularId": 15244,
  "createdOn": 1379938091000,
  "email": "rodion@hea.iki.rssi.ru",
  "subject": "GRB 130831A: RTT150 optical observations",
  "submitter": "Rodion Burenin at IKI, Moscow  <rodion@hea.iki.rssi.ru>",
  "eventId": "GRB 130831A"
}