[vsnet-grb-info 5872] GRB 080325: MITSuME Akeno optical upper limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  7522
SUBJECT: GRB 080325: MITSuME Akeno optical upper limits
DATE:    08/03/26 07:40:25 GMT
FROM:    Nobuyuki Kawai at Tokyo Tech  <nkawai at hp.phys.titech.ac.jp>

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
-----------------------------------------------------------------