{
  "bibcode": "2020GCN.28992....1N",
  "body": "M. Niwano, R. Hosokawa, K. L. Murata, R. Adachi, F. Ogawa, N. Nakamura,\nN. Ito, 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 201203A (S. Dichiara et al.,GCN Circular \n#28985) with the optical three color (g', Rc, and Ic) CCD cameras \nattached to the MITSuME 50 cm telescope of Okayama Astrophysical \nObservatory, Okayama, Japan.\nThe observation started at 12:02:06 UT. We did not find any new point \nsources within the Swift-XRT circle ( V. D'Elia et al., GCN Circular \n#28990) in all three bands.\nWe obtained the 5-sigma limits as follows.\nT0+[hour]�� MID-UT�� T-EXP[sec]�� 5-sigma limits\n------------------------------------------------------------------------------------------------ \n\n6.9�� 13:45:28.19�� 9000�� g'>17.9, Rc>18.6, Ic>17.7\n------------------------------------------------------------------------------------------------ \n\nT0+ : Elapsed time after the burst\nT-EXP: Total Exposure time\n\nWe used the PS1 catalog for flux calibration.\nThe magnitudes are expressed in the AB system.\nThe images were processed in real-time through the MITSuME GPU reduction \npipeline\n(Niwano et al., 10.1093/pasj/psaa091, arXiv:2008.11486; \nhttps://github.com/MNiwano/Eclaire).",
  "circularId": 28992,
  "createdOn": 1607068875000,
  "email": "niwano@hp.phys.titech.ac.jp",
  "subject": "GRB 201203A: MITSuME Okayama optical upper limits",
  "submitter": "Masafumi Niwano at Tokyo Institute of Tech  <niwano@hp.phys.titech.ac.jp>",
  "eventId": "GRB 201203A"
}