ATCA observations of
GRB990705
These results have been obtained as part of project C651 by D.A. Frail,
S.R. Kulkarni, the ATCA Alert group and the BeppoSAX GRB team.
Permission to quote results should be obtained from Dale Frail
(dfrail@aoc.nrao.edu).
Observations on 99:07:06 - Day 1
-
We obtained a 12 hour observation centered on July 6.33 at 4.8 GHz
and 8.6 GHz (750D array + 6km antenna).
Within the 2' NFI error circle there are two sources, which possibly
form one extended source, no other sources are detected above 5 sigma.
- Source fits on low resolution images, central 3x3':
6cm imsad,
3cm imsad
- Image:
4.8 GHz 14" res image with the GRB WFC
and NFI error circles, 68 uJy noise
- Image:
8.6 GHz 8" res image with the GRB WFC
and NFI error circles, 68 uJy noise
- Image:
4.8 GHz, 7" res image with the GRB WFC
and NFI error circles, 54 uJy noise
- Image:
8.6 GHz, 4" res image with the GRB WFC
and NFI error circles, 52 uJy noise
Observations on 99:07:08 - Day 3
-
We obtained an 11 hour observation centered on July 8.19 at 8.7 GHz
(750D array + 6km antenna, 2x128 MHz).
No radio source is detected at the position of the Optical Transient
with RA = 05 09 55.4, Dec = -72 08 01 (astrometric uncertainty of 1".5)
(GCN377).
No other sources are detected within the overlap of the IPN
(GCN380)
and NFI error regions.
- Image:
8.7 GHz 4" res image with the GRB WFC
and NFI error circles (green, red), the IPN error box (blue), and the optical transient
(orange), 36 uJy noise
Last changed on: 9-jul-1999
Mark.Wieringa@atnf.csiro.au