Skip to main content
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 16086

GRB 140408A: MITSuME Okayama upper limits
2014-04-08T23:45:08Z (10 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 MITSuME collaboration:

We observed the field of GRB 140408A (D'Elia et al., GCNC 16082)
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 2014-04-08 17:47:44 UT (~4.5 h after the burst).
We did not find any new point source within the enhanced XRT circle
(Evans et al., GCNC 16085) in all the three bands.

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
0.21515    18:25:43    4200.0   >19.1  >18.9  >18.3
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
Looking for U.S. government information and services? Visit