TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3074
SUBJECT: Swift  trigger 107518: optical observation
DATE:    05/03/07 17:21:55 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

D. Sharapov, M. Ibrahimov,   B. Kahharov,  R. Karimov, (UBAI), A.Pozanenko
(IKI), V.Rumyantsev (CrAO),  G.Beskin (SAO) report:

We observed error box of Swift  trigger 107518  with 1.5m telescope of
Mt.Maidanak high-altitude observatory. R-band images (4 x 180 s exposures)
were taken between (UT) 21:28 and 21:42 March 5, i.e. 46 minutes after
trigger and before ground analysis retraction of the trigger 107518 as GRB.
In comparison with DSS2 (red plate) no new source down to R~20 was found in
a stacked image within  error box. The limiting magnitude of the stacked
image is R~22.0.

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