TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  5510
SUBJECT: GRB060904B: Watcher observations
DATE:    06/09/04 05:05:41 GMT
FROM:    Petr Kubanek at AIO  <petr@lascaux.asu.cas.cz>

A. de Ugarte Postigo (IAA-CSIC Granada), J.French (UCD Dublin) and
P.Kubanek (AsU AV CR Ondrejov & ISDC Versoix) reports on behalf of the
Watcher collaboration:

The 0.4m Watcher telescope, located at Boyden Observatory, South Africa,
observed the SWIFT error box for GRB 060904B (Grupe et al. GCN 5505)
starting at 02:32:05 UT observing in R, V, I bands + unfiltered. We
detect the optical counterpart at coordinates reported by Rykoff et al.
(GCN 5504), with peak brightness unfiltered 17.1+/-0.3 at 02:39:30 UT,
consistent with Tarot peak detection (Klotz et al. GCN 5508).

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