TITLE:   GCN CIRCULAR
NUMBER:  9883
SUBJECT: GRB 090902B: WSRT Radio Observation
DATE:    09/09/04 07:17:14 GMT
FROM:    Alexander van der Horst at NASA/MSFC  <Alexander.J.VanDerHorst@nasa.gov>

A.J. van der Horst (NASA/MSFC/ORAU) A.P. Kamble, R.A.M.J. Wijers
(U of Amsterdam) and C. Kouveliotou (NASA/MSFC) report on behalf of
a large collaboration:

"We observed the position of the GRB 090902B afterglow with the
Westerbork Synthesis Radio Telescope at 4.8 GHz at September 3 12.72 UT
to September 4 0.35 UT, i.e. 1.07 - 1.55 days after the burst (GCN 9866).
We detect a radio source at the 4-sigma level with a flux density
of 111 +/- 28 microJy at the position of the optical counterpart
(GCN 9869, GCN 9874).

We would like to thank the WSRT staff for scheduling and obtaining these
observations."