[vsnet-grb-info 1879] GRB 050730: RTT150 optical observations

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3718
SUBJECT: GRB 050730: RTT150 optical observations
DATE:    05/07/31 23:27:15 GMT
FROM:    Rodion Burenin at IKI, Moscow  <rodion at hea.iki.rssi.ru>

R. Burenin, A. Tkachenko, M. Pavlinsky, R. Sunyaev (IKI), 
I. Khamitov, Z. Aslan (TUG), U. Kiziloglu (METU), A. Alpar (SabUni),
I. Bikmaev, N. Sakhibullin (KSU/AST)

report:

We observed optical afterglow of GRB 050730 (Holland et al., GCN #3704)
with Russian-Turkish 1.5-m telescope (RTT150, Bakyrlytepe, TUBITAK
National Observatory, Turkey). Observations were made under partially
clouded sky.  We obtained a set of 180s images in BVRI filters. Object
was clealy detected in I and R and marginally in V. Using reference star
from Holman et al. (GCN #3716) we estimate R=21.24+-0.17 at 19:01 UT,
July 31.

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