[vsnet-grb-info 11073] GRB 111022A: MITSuME Akeno Optical upper limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  12490
SUBJECT: GRB 111022A: MITSuME Akeno Optical upper limits
DATE:    11/10/24 12:25:42 GMT
FROM:    Yoichi Yatsu at Tokyo Tech.  <yatsu at hp.phys.titech.ac.jp>

K. Tokoyoda, Y. Yatsu, Y. Aoki, R. Usui, K. Kawakami, M. Hayashi, S. Song,
and N. Kawai (Tokyo Tech)  report on behalf of the MITSuME collaboration:

We observed GRB 111022A (S. Immler et al, GCN12471)
with the optical three color (g, Rc, and Ic) CCD camera attached
to the MITSuME 50 cm telescope of Akeno Observatory, Yamanashi, Japan.

The observation started on 2011-10-23 9:16:56 UT (~16.8 h after the burst).
We did not find any new point source within the Swift XRT error
circle (G. Stratta et al, GCN12482) in three bands.

Photometric results and are listed below. We used GSC2.3 catalog for
flux calibration.

T0+[day]      MID-UT     T-EXP[sec]      g'             Rc           Ic
---------------------------------------------------------------------------------
 0.71519     9:47:22        3060         >18.4       >16.5       >16.5
---------------------------------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]