[vsnet-grb-info 3784] GRB 060926: RTT150, UVOT afterglow candidate confirmation

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  5618
SUBJECT: GRB 060926: RTT150, UVOT afterglow candidate confirmation
DATE:    06/09/26 20:18:53 GMT
FROM:    Irek Khamitov at TUG  <irekk at tug.tug.tubitak.gov.tr>

U. Kiziloglu (METU), I. Khamitov (TUG), Z. Aslan (TUG), 
E. Gogus (Sabanci Uni.), 
R. Burenin, M. Pavlinsky, R. Sunyaev (IKI)
I. Bikmaev, N. Sakhibullin (KSU/AST),

report:

   We observed the field around the XRT error circle (Holland et al., 
GCN5612) of GRB060926 (Swift trigger 231231) with the Russian-Turkish 
1.5-m telescope (RTT150, Bakirlitepe, TUBITAK National Observatory, 
Turkey), at the 17:45 UT of Sep 26, about 56 minutes after the burst. 
A series of frames (3*300sec) were taken in R band with TFOSC. 
  At the position of UVOT afterglow candidate (GCN5612) we detect a  faint 
source  which faded more than 1 mag according to early detection 
(Stefanescu et al., GCN5614).  
 Using USNO-B1 star (RA=17:35:42.06, DEC=+13:02:11.7, R2MAG=18.96) we 
estimate the following R magnitude for the source:

    t-t0    m_R     err
    (min)	
    66.5    20.8    0.1	

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