[AAVSO-HEN] GRB 080702A: MITSuME Akeno optical upper limits

[grb at aavso.org]

The following is a GCN Circular circulated via the AAVSO network.
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TITLE:   GCN CIRCULAR
NUMBER:  7929
SUBJECT: GRB 080702A: MITSuME Akeno optical upper limits
DATE:    08/07/03 00:07:25 GMT
FROM:    Nobuyuki Kawai at Tokyo Tech  <nkawai at hp.phys.titech.ac.jp>

Y.A. Mori, T. Shimokawabe, Y. Kudou, H. Nakajima and N. Kawai (Tokyo
Tech) report on behalf of the MITSuME collaboration: 

The 3-color 50cm MITSuME Telescope at Akeno, Japan, responded to GRB
080702A (de Pasquale et al. GCN 7920) at 43 sec after the trigger,
though we obtained the first sky image 20 min after the trigger
due to the poor sky condition with frequent cloud coverage.  
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 UT    end UT    Exposure   LimitMag   
---------------------------------------------------
  g'    12:16:37    13:11:35   23 x 60 s    16.6   
  Rc    12:16:37    13:11:35   23 x 60 s    17.7
  Ic    12:16:37    13:11:35   23 x 60 s    16.5
---------------------------------------------------