[vsnet-grb-info 5708] GRB 080307: Optical observation with DMC/KANATA

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  7363
SUBJECT: GRB 080307: Optical observation with DMC/KANATA
DATE:    08/03/07 12:33:44 GMT
FROM:    Makoto Uemura at Hiroshima U  <uemuram at hiroshima-u.ac.jp>

M. Doi, S. Sako, J. Hayano, Y. Ihara, N. Takanashi, 
H. Kuncarayakti (The Univresity of Tokyo), D. Kuroda (NAOJ), 
K. S. Kawabata, and M. Uemura (Hiroshima Univ.)
report on behalf of the DMC team:

  We took optical CCD images of the field of GRB 080307 (GCNC 7362)
with Dichroic Mirror Camera (DMC; http://www.ioa.s.u-tokyo.ac.jp/dmc/)
attached to the 1.5-m KANATA telescope.  
DMC enables us to simultenaously obtain 15 band images in the 
optical range (typical delta lambda = 35 nm). 
We started observations at 11:31:18 (UT) 7 March 2008, 
467 s after the burst.  The exposure time was 60 s.  

No candidate of its optical afterglow brighther than 
r=17.13 mag (USNO B1.0 1251-0170228; RA=09:06:33.62, Dec=+35:08:44.1)
was found in our all images.

YYYYDDMM(UT)    limit mag.   center of wavelengths   
20080307.4804    17.13 r     641nm (chanel 07 of DMC)