TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  5547
SUBJECT: GRB 060904A : Optical limit
DATE:    06/09/08 11:53:10 GMT
FROM:    Yuji Urata at Saitama U  <urata@crystal.heal.phy.saitama-u.ac.jp>

H. Mito, T. Soyano, (Tokyo Univ.) and Y. Urata (Saitama Univ.)
on behalf of EAFON report:

"We have observed the position of X-ray afterglow using Kiso 1.05m
Schmited telescope.  The observation was started at 10:20 UT September
4, 2006. The combined image from 20 frames taken with 300 sec exposure
shows no optical afterglow associated with the X-ray afterglow
position brighter than 22.4 (R) mag.

  -------------------------------------------
  Start time  Exposure            Limit(SN=3)
  10:20       300 sec x 20 frame  > 22.4
  -------------------------------------------

This message may be cited."