[vsnet-grb-info 9753] GRB 100901A: Possible WSRT Radio Detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  11221
SUBJECT: GRB 100901A: Possible WSRT Radio Detection
DATE:    10/09/06 04:36:07 GMT
FROM:    Alexander van der Horst at NASA/MSFC  <Alexander.J.VanDerHorst at nasa.gov>

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

"We observed the position of the GRB 100901A afterglow at 4.9 GHz
with the Westerbork Synthesis Radio Telescope at September 3 20.35 UT
to September 4 08.50 UT, i.e. 2.29 - 2.79 days after the burst (GCN 11159).
We detect a radio source at the position of the X-ray and UV/optical
counterpart (GCN 11195) at the 4-sigma level, with a flux density of
134 +/- 33 microJy.

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