TITLE:   GCN CIRCULAR
NUMBER:  10774
SUBJECT: GRB 100513A: MITSuME Akeno Optical Observation
DATE:    10/05/18 13:50:13 GMT
FROM:    Yoichi Yatsu at Tokyo Tech.  <yatsu@hp.phys.titech.ac.jp>

Y.Yatsu, H. Nakajima, T. Enomoto, K. Kawakami,
K. Tokoyoda, Shimokawabe, and N. Kawai (Tokyo Tech)
 report on behalf of the MITSuME collaboration:

We observed the field of GRB100513A (Baumgartner et al. GCNC 10746)
with the three color (g', Rc and Ic) CCD camera attached
to the MITSuME 50 cm optical telescope at Akeno, Japan.

The observation started at 2010-05-13 11:07:42 UT.
On the combined images, we could not find the optical counterpart
 in the XRT error circle (GCN 10746) in the three bands.
The 3-sigma upper limits based on the GSC2.3 catalog are listed below:

Start(UT) -- END(UT)  Total EXP[sec]    g'     Rc     Ic
----------------------------------------------------------------
11:07:42.1 -- 11:32:45.1   540.0      >18.9  >18.8  >18.3
14:23:16.8 -- 14:50:38.0   960.0      >17.8  >18.0  >17.4
14:50:46.5 -- 15:36:25.0  2220.0     > 19.1 > 19.0 > 18.4
----------------------------------------------------------------