GCN Circular 3120

GRB 050319 : Confirmation of optical afterglow decay
 
T. Yoshioka (Naogya Univ.), C.W. Chen (NCU), S.Nishiura (Tokyo Gakugei
Univ.), M. Isogai (Tokyo Univ.), T. Soyano(Tokyo Univ.), W.P. Chen (NCU)
Y. Urata, T. Tamagawa (RIKEN), K.Y. Huang, W.H. Ip (NCU), Y. Qiu (BAO) 
and Y.Q. Lou(THCA) 
on behalf of the East Asian collaboration report:

" We have observed the afterglow candidate of GRB 050319 (Rykoff et al.  
# 3116, Krimm et al. # 3117) using Kiso 1.05-m and Lulin 1-m
telescopes starting at 2005 Mar. 19, 10:45 UTC (after end of
twilight). We have imaged the optical candidate (Rykoff et al. # 3116)
clearly in BVRI bands.  Based on our preliminary photometry for R-band
images, we have confirmed the decay of the optical candidate.

Observation time and magnitudes are:

  Filter  Exposure   UT     Mag.   site
   R       300s     10:45   19.5    Kiso
   R       300s     11:28   19.5    Lulin
   R       300s     13:29   20.0    Kiso
 
Further observations are in progress, this message may be cite."