[vsnet-grb-info 4164] GRB 061222B: Observation with the KANATA 1.5m telescope

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  5971
SUBJECT: GRB 061222B: Observation with the KANATA 1.5m telescope
DATE:    06/12/22 15:50:42 GMT
FROM:    Makoto Uemura at Hiroshima U  <uemuram at hiroshima-u.ac.jp>

M. Uemura, A. Arai, and T. Uehara (Hiroshima Univ.), 
report on behalf of the KANATA GRB team:

  We perfomed optical imaging of the field of GRB061222B (GCN 5957) at 
15:10-15:17 UT 22 Dec. using the TRISPEC attached to the KANATA 
1.5-m telescope at Higashi-Hiroshima Observatory, Japan.  
We obtained 4 R-band images with a 123-s exposure time.  The images were
calibrated with neighbor stars in the USNO A2.0 catalog (r mag.). 

We cannot significantly detect the afterglow at the position reported in 
GCN 5956 in our images.  The limit magnitude is estimated to be 20.2 
(3-sigma).  

UT            Time after the burst (s)    Limit mag in R   Exp. Time
Dec. 22.63480        39784                    20.2          123 * 4