{
  "bibcode": "2020GCN.28271....1H",
  "body": "Takashi Horiuchi, Hidekazu Hanayama (NAOJ), Katsuhiro L. Murata,\nYoichi Yatsu, Nobuyuki Kawai (Tokyo Tech) report on behalf of the\nMITSuME collaboration:\n\nWe observed the field of GRB 200819A (Dichiara et al., GCN 28263;\nEvans et al., GCN 28265) with the optical three color (g', Rc, and Ic)\nCCD cameras attached to the 105 cm Murikabushi telescope of\nIshigakijima Astronomical Observatory, Okinawa, Japan.\n\nThe observation with a series of 60 sec exposures started on\n2020-08���19 16:35:33 UT. Throughout, the images were terribly extended\nby the altitude oscillation of the Murikabushi Telescope. We stacked\nthe 79 images and did not find any new point sources other than the\nUSNO-B1.0 sources from the stacked images. We obtained the SN = 10\nlimits as follows.\n\nT0+[min] MID-UT T-EXP[sec] SN=10 limits\n------------------------------------------------------------------------------------------------\n52 2020-08-19T17:21:38 960 g'>18.7, Rc>19.0, Ic>17.8\n------------------------------------------------------------------------------------------------",
  "circularId": 28271,
  "createdOn": 1597898593000,
  "email": "murata@u.phys.nagoya-u.ac.jp",
  "subject": "GRB 200819A: MITSuME Ishigaki optical upper limits",
  "submitter": "Katsuhiro L. Murata at Nagoya U  <murata@u.phys.nagoya-u.ac.jp>",
  "eventId": "GRB 200819A"
}