{
  "bibcode": "2020GCN.28215....1M",
  "body": "K. L. Murata, R. Adachi, R. Hosokawa, M. Niwano, F. Ogawa, N. Nakamura, N.\nIto, S. Ogata, H. Takamatsu, H. Hara, Y. Yatsu, and N. Kawai (TokyoTech)\nreport on behalf of the MITSuME collaboration:\n\nWe observed the field of GRB 200806A (Ambrosi et al., GCN 28211; Beardmore\net al., GCN 28214) with the optical three color (g', Rc, and Ic) CCD\ncameras attached to the MITSuME 50 cm telescope of Akeno Observatory,\nYamanashi, Japan.\n\nThe observation with a series of 60 sec exposures started on 2020-08���06\n15:30:34 UT. The first 15 images were heavily affected by the presence of\nthe moon. We stacked the images excluding the 15 images and did not find\nany new point sources within the enhanced Swift/XRT error circle (Beardmore\net al., GCN 28214) of the stacked images. We obtained the 5-sigma limits as\nfollows.\n\nT0+[min] MID-UT T-EXP[sec] 5-sigma limits\n------------------------------------------------------------------------------------------------\n19 2020-08-06T15:57:10 960 g'>16.7, Rc>16.7, Ic>16.9\n------------------------------------------------------------------------------------------------\nT0+: Elapsed time after the burst\nT-EXP: Total Exposure time\n\nWe used the PS1 catalog for flux calibration. The magnitudes are expressed\nin the AB system. The images were processed in real-time through the\nMITSuME GPU reduction pipeline (Niwano et al., submitted;\nhttps://github.com/MNiwano/Eclaire)",
  "circularId": 28215,
  "createdOn": 1596779819000,
  "email": "murata@u.phys.nagoya-u.ac.jp",
  "subject": "GRB 200806A: MITSuME Akeno optical upper limits",
  "submitter": "Katsuhiro L. Murata at Nagoya U  <murata@u.phys.nagoya-u.ac.jp>",
  "eventId": "GRB 200806A"
}