{
  "bibcode": "2017GCN.21121....1K",
  "body": "D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ),\nS. Nagayama (NAOJ), M. Yoshida (Subaru, NAOJ), K. Ohta (Kyoto)\nand N. Kawai(Tokyo Tech)\nreport on behalf of the MITSuME and OISTER collaboration:\n\nWe observed the field of GRB 170519A (Ukwatta et al., GCNC 21106)\nwith the optical three color (g', Rc and Ic) CCD camera attached\nto the MITSuME 50cm telescope of Okayama Astrophysical Observatory.\n\nThe observation started on 2017-05-19 11:03:26 UT (~5.9 h after\nthe burst). We detected the previously reported afterglow (Ukwatta\net al., GCNC 21106; Izzo et al., GCNC 21108) in all the three bands.\n\nPhotometric results of the OT are listed below. We used SDSS-DR8\ncatalog for flux calibration.\n\n#T0+[day]  MID-UT    T-EXP[sec]   g'  g'_err  Rc  Rc_err  Ic  Ic_err\n------------------------------------------------------------------\n0.26646    11:33:44    3120.0    19.1  0.2   18.7 0.2   18.1  0.2\n------------------------------------------------------------------\nT0+ : Elapsed time after the burst [day]\nT-EXP: Total Exposure time [sec]",
  "circularId": 21121,
  "createdOn": 1495256514000,
  "email": "dikuroda@oao.nao.ac.jp",
  "subject": "GRB 170519A: MITSuME Okayama Optical Observation",
  "submitter": "Daisuke Kuroda at OAO/NAOJ  <dikuroda@oao.nao.ac.jp>",
  "eventId": "GRB 170519A"
}