[vsnet-grb-info 21792] GRB190211A: MITSuME Akeno optical observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  23891
SUBJECT: GRB190211A: MITSuME Akeno optical observation
DATE:    19/02/12 11:18:29 GMT
FROM:    Motoki Oeda at Tokyo Inst. of Tech.  <oeda at hp.phys.titech.ac.jp>

M. Oeda, R. Itoh, K. L. Murata, Y. Tachibana, S. Harita, K. Morita,
K. Shiraishi, K. Iida, 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 190211A (F. E. Marshall et
al., GCN
Circular #23883) with the optical three color (g', Rc, and Ic) CCD cameras
attached to the MITSuME 50cm telescope of Akeno Observatory, Yamanashi,
Japan.

The observation started on 16:55:48.41 UT which corresponds to
64 sec after the trigger.
We detected the point source at the position consistent with the robotic
NEXT-0.6m telescope
observation (D. Xu et al., GCN Circular #23884).
The measured magnitudes are listed as follows.

T0+[sec]    MID-UT      T-EXP[sec]        g'       Rc        Ic
-------------------------------------------------------------------------------------------------------
~64      16:56:48.41          120              ~18.3      ~17.7     ~17.0
-------------------------------------------------------------------------------------------------------
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 Vega system.