GCN Circular 3896
Subject
GRB050820A: RTT150 optical observations
Date
2005-08-28T04:19:16Z (19 years ago)
From
Irek Khamitov at TUG <irekk@tug.tug.tubitak.gov.tr>
Z. Aslan, I. Khamitov (TUG), U. Kiziloglu (METU), E. Gogus (Sabanci Uni.),
I. Bikmaev, A. Galeev, N. Sakhibullin (KSU/AST),
R. Burenin, M. Pavlinsky, R. Sunyaev (IKI),
report:
We have continued observing the OT of GRB 050820A (GCN 3829) with
the Russian-Turkish 1.5-m telescope (Bakirlitepe, TUBITAK National
Observatory, Turkey) using TFOSC in R band.
We made 5*300s exposures between UT 22:40 - 23:05, August 27. Using
Henden's stars (GCN 3845) present in the frames, we estimated the
magnitude of the co-added image as R=22.14+/-0.1 (184.25h after the
trigger).
The OT is fading with the same power-law decay. Using all the data
obtained at the RTT150 (GCN3864, GCN3853) we estimated an alpha index of
power-law decay of -1.06+/-0.03.
The JPG-image is available at:
http://www.tug.tubitak.gov.tr/~irekk/grb/grb050820a/grb050820A_050827r.JPG
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