7 papers · 1 filter
Intrinsic intraday variability in the gravitational lens system B0218+357
A. D. Biggs, I. W. A. Browne, P. N. Wilkinson
Radio monitoring of the gravitational lens system B0218+357 reveals it to be a highly variable source with variations on timescales of a few days correlated in both images. This sh…
VLA and MERLIN monitoring observations of the gravitational lens system B1030+074
E. Xanthopoulos, I. W. A. Browne, A. R. Patnaik +1
We present VLA and MERLIN monitoring data of the JVAS gravitational lens system B1030+074. The system was monitored with the VLA from February 1998 to October 1998 at 8.4-GHz durin…
AGN and starbursts at high redshift: High resolution EVN radio observations of the Hubble Deep Field
M. A. Garrett, T. W. B. Muxlow, S. T. Garrington
We present deep, wide-field European VLBI Network (EVN) 1.6 GHz observations of the Hubble Deep Field (HDF) region with a resolution of 0.025 arcseconds. Above the 210 microJy/beam…
MERLIN/VLA imaging of the gravitational lens system B0218+357
A. D. Biggs, I. W. A. Browne, T. W. B. Muxlow +1
Gravitational lenses offer the possibility of accurately determining the Hubble parameter (H_0) over cosmological distances, and B0218+357 is one of the most promising systems for…
The JVAS/CLASS 6'' to 15'' Lens Search
P. M. Phillips, I. W. A. Browne, P. N. Wilkinson +1
We present the strategy and status of a gravitational lens search for multiple imaging with angular separations between 6'' and 15'' with the combined JVAS and CLASS data set of ~1…
The core-jet structure of the JVAS gravitational lens B1030+074
E. Xanthopoulos, M. Norbury, A. Karidis +6
We present results from VLBA+Effelsberg 1.7 GHz, VLBA 8.4 GHz and VLBA 15 GHz observations of the JVAS gravitational lens system B1030+074. The VLBA+Effelsberg 1.7 GHz data with 3…