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GCN Circular 13896

GRB 121024A: MITSuME Okayama Optical upper limits
2012-10-25T10:54:18Z (12 years ago)
Daisuke Kuroda at OAO/NAOJ <>
D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ),
S. Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto)
and N. Kawai(Tokyo Tech)
report on behalf of the MITSuME collaboration:

We observed the field of GRB 121024A (Pagani et al., GCNC 13886)
with the optical three color (g', Rc and Ic) CCD camera attached
to the MITSuME 50cm telescope of Okayama Astrophysical Observatory.

The observation started on 2012-10-24 13:51:59 UT (~10.9 h after the burst)
We did not find any new point source within the enhanced XRT circle
(Osborne et al., GCNC 13894) in all the three bands.
We also could not detect the previously reported afterglow
(Klotz et al., GCNC 13887).

Three sigma upper limits of the OT are listed below. We used
GSC2.3 catalog for flux calibration.

T0+[day]   MID-UT   T-EXP[sec]    g'     Rc     Ic
0.55338    16:13:04    7740.0   >20.1  >20.0  >19.3
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
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