[vsnet-grb-info 21309] GRB 181103A: MITSuME Okayama optical upper limits
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Mon Nov 5 13:37:14 JST 2018
TITLE: GCN CIRCULAR
NUMBER: 23408
SUBJECT: GRB 181103A: MITSuME Okayama optical upper limits
DATE: 18/11/05 04:35:48 GMT
FROM: Katsuhiro L. Murata at Nagoya U <murata at u.phys.nagoya-u.ac.jp>
K. L. Murata, R. Itoh, Y. Tachibana, S. Harita, K. Morita, K. Shiraishi, K.
Iida, M. Oeda, M. Niwano, R. Adachi, Y. Yatsu, and N. Kawai (Tokyo Tech)
report on behalf of the MITSuME collaboration:
We searched for the optical counterpart of GRB 181103A (A. Tohuvavohu et
al., GCN Circular #23402) with the optical three color (g', Rc, and Ic) CCD
cameras attached to the MITSuME 50 cm telescope of Okayama Astrophysical
Observatory, Japan.
The observation started on 19:38:58 UT. We did not find any new point
source within enhanced XRT circle (P.A. Evans et al., GCN Circular #23403)
in all three bands. We obtained following limits for the magnitudes.
T0+[hour] MID-UT T-EXP[sec] g' Rc Ic
-------------------------------------------------------------------------------------------------------
15.352 20:15:29 3240 >18.5 >18.0 >17.5
-------------------------------------------------------------------------------------------------------
T0+ : Elapsed time after the burst
T-EXP: Total Exposure time
We used GSC2.3 catalog for flux calibration.
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