10 papers · 1 filter
Changes in the measured image separation of the gravitational lens system, PKS 1830-211
C. Jin, M. A. Garrett, S. Nair +3
We present eight epochs of 43 GHz, dual-polarisation VLBA observations of the gravitational lens system PKS 1830-211, made over fourteen weeks. A bright, compact ``core'' and a fai…
Interferometric Phase Calibration Sources in the Declination Range 0deg to -30deg
Joshua N. Winn, Alok R. Patnaik, J. M. Wrobel
We present a catalog of 321 compact radio sources in the declination range 0deg > delta > -30deg. The positions of these sources have been measured with a two-dimensional rms accur…
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…
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…
III Zw 2, the first superluminal jet in a Seyfert galaxy
Andreas Brunthaler, Heino Falcke, Geoffrey C. Bower +6
So far all relativistically boosted jets with superluminal motion have only been detected in typical radio galaxies with early type host galaxies. We have now discovered superlumin…
Everything you ever wanted to know about the JVAS gravitational lens system B1030+074 but were afraid to ask
E. Xanthopoulos, I. W. A. Browne, P. N. Wilkinson +6
We present an overview of all the observations (radio - VLA, MERLIN, VLBA,EVN - and optical - WFPC2 and NICMOS -) that were initially used to confirm the gravitational lens nature…