TITLE:   GCN CIRCULAR
NUMBER:  13548
SUBJECT: GRB 120729A: RTT150 optical observations
DATE:    12/07/31 10:28:25 GMT
FROM:    Rodion Burenin at IKI, Moscow  <rodion@hea.iki.rssi.ru>

I. Khamitov (TUG), E.Beklen (SD Uni.),
Z. Eker (TUG), U. Kiziloglu (METU),  E. Gogus (Sabanci Uni.),
R. Burenin, M. Pavlinsky, R. Sunyaev (IKI),
I. Bikmaev, N. Sakhibullin (Kazan Federal University)

report:

We observed the field of the Swift-BAT GRB 120729A (Ukwatta et al. GCN
15530 ) with Russian-Turkish 1.5-m telescope (RTT150, Bakirlitepe,
TUBITAK National Observatory, Turkey), starting at 30 Jul, 01:26 UT,
i.e. approximately 14.5 hours after the burst, using TFOSC instrument.

We made 6x300s exposures in R-band under good atmospheric conditions
(1.4 arcsec seeing) at the beginning of morning twilight without
moonlight. We do not detect any new source on combined image at the
position of OT (Virgili et al., GCN13531; Oates and Ukwatta,
GCN13539). Using USNO-B1 stars we estimated the limiting magnitude of
combined image as m_R =~ 23.5.

A small field around of the OT position can be found at:

http://hea.iki.rssi.ru/grb/120729a/indexeng.html