GCN Circular 1990
Subject
GRB 030328: optical observations
Date
2003-03-29T15:15:55Z (21 years ago)
From
Denis Denissenko at IKI, Moscow <denis@hea.iki.rssi.ru>
R. Burenin, D. Denissenko, M. Pavlinsky, R. Sunyaev, O. Terekhov, A.
Tkachenko (IKI); Z. Aslan, I. Khamitov, K. Uluc (TUG); U. Kiziloglu, A.
Alpar, A. Baykal (METU); I. Bikmaev, N. Sakhibullin, V. Suleymanov (KSU)
report:
Error box of GRB030328 (HETE Trigger #2650, GCN 1978) was observed with
1.5-m Russian-Turkish Telescope RTT150 at Bakyrlytepe (TUBITAK National
Observatory, Turkey) between Mar. 28.80 and 29.02 UT, starting appr.
9-10 hours after the burst. A set of 300-second exposures in BVRI Bessel
filters was obtained under poor photometric conditions.
We confirm the presence of the optical transient (OT) reported by
Peterson and Price (GCN 1974). R magnitude of the OT on Mar. 28.952
(0.480 day after the burst) is estimated to be 20.35, assuming that Star
B in GCN 1975 is R=16.1. This is brighter than the extrapolation of the
power law from Price and Peterson (GCN 1977).
OT is clearly visible in other filters in every 300-s exposure. The
magnitudes in BVI will be obtained after we calibrate the field.
The R image can be found at: http://hea.iki.rssi.ru/~br/r.gif
Preliminary lightcurve in R: http://hea.iki.rssi.ru/~br/lc_r.ps
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