[vsnet-grb-info 3351] GRB 060526: RTT150 optical observations

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  5186
SUBJECT: GRB 060526: RTT150 optical observations
DATE:    06/05/30 05:05:45 GMT
FROM:    Rodion Burenin at IKI, Moscow  <rodion at hea.iki.rssi.ru>

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

report:

We observed the optical counterpart of GRB060526 (Campana et al. GCN
5162; French & Jelinek GCN 5165; Rykoff et al. GCN 5166) with
Russian-Turkish 1.5-m telescope (RTT150, Bakirlitepe,TUBITAK National
Observatory, Turkey), starting at May. 29, 18:44UT, i.e. ~74.26 hours
after the burst. A series of frames were taken. The afterglow is
detected in Rc band and marginally in V.

We estimate the following Rc magnitudes for the OT:

    t-t0  m_R     err
   76.03  22.19  0.07
   78.13  22.31  0.07
   80.40  22.45  0.12

These points lie approximately on the extrapolation of the first day
power law decay (e.g., Khamitov et al., GCN 5173).

Our Rc lightcurve can be found at:

http://hea.iki.rssi.ru/grb/060526/lc_0529.jpg

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