{
  "bibcode": "2016GCN.19008....1M",
  "body": "Tomoki Morokuma (The University of Tokyo), Nozomu Tominaga (Konan\nUniversity), Masaomi Tanaka (National Astronomical Observatory of\nJapan), Akihiro Suzuki (Kyoto University), Motoko Serino (RIKEN),\nTakanori Sakamoto (Aoyama Gakuin University), and Keiichi Maeda (Kyoto\nUniversity) report:\n\nWe took r-band images for the field of GRB 160206A (Furuya et al. 2016,\nGCN Circ. 18993) 10.5 hours after the trigger with the Kiso Wide Field\nCamera (KWFC; Sako et al. 2012, SPIE, 8446, 84466L) on the 1.05-m Kiso\nSchmidt telescope in Japan. Our data were taken in a very low elevation\n(10-15 degrees) and the detection limits were 17.0 mag (S/N=5, without\nthe Galactic extinction correction). No optical afterglow is detected at\nthe position of Swift XRT source 2 (Page et al. 2016, GCN Circ. 18996)\nin any of our ten 180-sec exposures. The Swift XRT source 1 (TYC\n7149-2271-1) is saturated in all the images and it is difficult to\nevaluate its time variability.\n\nStarting times (UT) of the exposures are summarized as below.\n\n date(UT)    time  t_exp[s]\n2016-02-06 13:27:19 180\n2016-02-06 13:32:51 180\n2016-02-06 13:38:17 180\n2016-02-06 13:43:43 180\n2016-02-06 13:49:06 180\n2016-02-06 13:54:36 180\n2016-02-06 14:00:01 180\n2016-02-06 14:05:26 180\n2016-02-06 14:10:50 180\n2016-02-06 14:16:17 180",
  "circularId": 19008,
  "createdOn": 1455079604000,
  "email": "tmorokuma@ioa.s.u-tokyo.ac.jp",
  "subject": "GRB 160206A: Kiso/KWFC optical observations",
  "submitter": "Tomoki Morokuma at U of Tokyo  <tmorokuma@ioa.s.u-tokyo.ac.jp>",
  "eventId": "GRB 160206A"
}