GCN Circular 23415

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 181110A (Evans  et al., GCN
Circular #23413) with the optical three color (g', Rc, and Ic) CCD cameras
attached to the MITSuME 50 cm telescope of AkenoObservatory, Yamanashi,
Japan.

The observation for the position of the 1st GCN of this trigger (trigger
#871316) started on 08:44:56 UT which corresponds to 85 sec after the
trigger.

Here we report the result of the images after 08:55:15 UT.
We detected the point source at the position consistent with the Swift/UVOT
observation (Evans  et al., GCN Circular #23413) and the Kanata observation
(Yamanaka et al., GCN Circular # 23414).
The measured magnitudes are listed as follows.

T0+[min]    MID-UT      T-EXP[sec]        g'       Rc        Ic
-------------------------------------------------------------------------------------------------------
~12      09:00:58.3           420               ~14      ~14        ~14
-------------------------------------------------------------------------------------------------------
T0+ : Elapsed time after the burst
T-EXP: Total Exposure time
We used GSC2.3 catalog for flux calibration.
The magnitudes are expressed in the AB system.

Further analysis is ongoing.