Showing 1999Show all
3 papers · 1 filter
astro-ph1999
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…
astro-ph1999
VLA 8.4 GHz monitoring observations of the CLASS gravitational lens B1933+503
I. W. A. Browne, E. Xanthopoulos, A. D. Biggs +1
The complex 10-component gravitational lens B1933+503 has been monitored with the VLA during the period February to June 1998. Here we present the results of this A-configuration 8…
astro-ph1999
Measuring H_0 with CLASS B1608+656: The Second Season of VLA Monitoring
C. D. Fassnacht, E. Xanthopoulos, L. V. E. Koopmans +3
The four-component gravitational lens CLASS B1608+656 has been monitored with the VLA for two seasons in order to search for time delays between the components. These time delays c…