TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  1488
SUBJECT: GRB020813, optical observations
DATE:    02/08/14 14:11:06 GMT
FROM:    Umit Kiziloglu at Middle East Tech.U,Phys.Dept  <umk@astroa.physics.metu.edu.tr>

U. Kiziloglu, A. Alpar, A. Baykal, S. Y. Kaan, A. Ankay, (METU); 
O. Huseyin, (AU);  O. Terekov, R. Sunyaev, A. Tkachenko, D. Denissenko, (IKI);
I. Bikmaev, N. Sakhibullin, V. Suleymanov,  (KSU); I. Khamitov, (TUG)
reports:

We have observed the optical transient (OT) of GRB020813 (HETE Trigger #2262; 
GCN 1471) with TUG's (TUBITAK National Observatory, Turkey) RTT150 1.5m 
telescope and SDSU camera on 13th August 2002, with  1.0 arcsec seeing.

We also confirm the presence of the transient reported by Fox, Blake & Price
(GCN 1470).

A combined image of eight R-band exposures (sums up to 24 minutes)
centered at 20:40 UT (almost 18 hours after the event) gives R=20.0+/-0.2,
using USNO-A2 magnitude estimates. Analysis of the full data set is underway.

Combined image can be found at:
http://astroa.physics.metu.edu.tr/GRB020813/ .

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