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GCN Circular 7522

GRB 080325: MITSuME Akeno optical upper limits
2008-03-26T07:40:25Z (16 years ago)
Nobuyuki Kawai at Tokyo Tech <>
Y. Kudou, T. Shimokawabe and N. Kawai (Tokyo Tech) report on behalf of
the MITSuME collaboration: 

We observed the error box of GRB 080325 (L. Vetere et al. GCN 7512)
with the 3-color 50cm MITSuME Telescope at Akeno, Japan starting
at 16:51:16 Mar 25 UT, 12.7 hr after the trigger under a poor sky
condition at a low altitude.
In the co-added images of Ic, Rc, and g' bands, we did not detect
any afterglow candidate in the XRT error circle.  
The 3-sigma limiting magnitudes based on USNO-B1.0 (I-band) and NOMAD
(R-band,g'-band) stars are following.

Filter   start time   end time    Exposure   Mag (3-sigma upper limit)
g'     16:51:16      17:54:41     15 x 60 s     17.2
Rc     16:51:16      17:54:41     15 x 60 s     16.4
Ic     16:51:16      17:54:41     15 x 60 s     17.0
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