TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  1528
SUBJECT: GRB020813: optical observation
DATE:    02/08/28 11:08:21 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

G.Beskin, A.Birjukov, S.Koposov, O.Spiridonova (SAO) and A.Pozanenko (IKI)
report:

We have observed the OT of GRB020813 reported by D. Fox et al. (GCN 1470)
with Zeiss-1000 telescope of Special Astrophysical Observatory (SAO). Three
R-band images (exposure of each 303 sec) were taken on August 13 between
18:43 - 19:05 UT.

Using combined image of the 3 exposures and calibration data provided by A.
Henden (GCN 1503) we obtained R magnitude of 19.70 +/- 0.25.

The combined image may be found at http://grb.rssi.ru/GRB020813
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R=19.70 +/- 0.25 at UT 18.72 August 13, 2002
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