341 citations · 931 across the 22 of their papers we have counts for
4 papers · 1 filter
A New Quadruple Gravitational Lens System: CLASS B0128+437
P. M. Phillips, M. A. Norbury, L. V. E. Koopmans +15
High resolution MERLIN observations of a newly-discovered four-image gravitational lens system, B0128+437, are presented. The system was found after a careful re-analysis of the en…
The Lens-Redshift Test Revisited
Phillip Helbig
Kochanek (1992) suggested that the redshifts of gravitational lens galaxies rule out a large cosmological constant. This result was questioned by Helbig & Kayser (1996), who pointe…
The Current Status of CLASS
Phillip Helbig
I give a brief overview of the current status of some aspects of the Cosmic Lens All-Sky Survey (CLASS): description of the survey, current list of lens systems, cosmological param…
CLASS B0827+525: `Dark lens' or binary radio-loud quasar?
L. V. E. Koopmans, A. G. de Bruyn, C. D. Fassnacht +12
We present radio, optical, near-infrared and spectroscopic observations of the source B0827+525. We consider this source as the best candidate from the Cosmic Lens All-Sky Survey (…