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GCN Circular 16053

GRB 140331A: MITSuME Okayama upper limits
2014-03-31T15:22:50Z (10 years ago)
Daisuke Kuroda at OAO/NAOJ <>
D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ),
S. Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto)
and N. Kawai(Tokyo Tech)
report on behalf of MITSuME collaboration:

We observed the field of GRB 140331A (Zhang et al., GCNC 16049)
with the optical three color (g', Rc and Ic) CCD camera attached
to the MITSuME 50cm telescope of Okayama Astrophysical Observatory.

The observation started on 2014-03-31 10:40:24 UT (~4.8 h after the burst).
We could not detect the previously reported afterglow (Littlejohns et al.,
GCNC 16050) in all the three bands.

Three sigma upper limits of the OT are listed below.
We used SDSS-DR7 catalog for flux calibration.

#T0+[day]  MID-UT    T-EXP[sec]   g'     Rc     Ic
0.21730    11:02:43    2040.0   >19.6  >19.7  >18.7
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
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