CLASS B0445+123: a new two-image gravitational lens system

Authors :: John McKean
Roger Blandford
Megan Argo
Iwa Browne
Christopher D. Fassnacht
David Rusin
Steven T. Myers
T. J. Pearson
A. G. de Bruyn
Peter N. Wilkinson
D. R. Marlow
A. C. S. Readhead
Kyu-Hyun Chae
Léon V. E. Koopmans
M. A. Norbury
P. M. Phillips
T. York
Neal Jackson
A. D. Biggs
Astronomy
Kapteyn Astronomical Institute
Source :: Monthly Notices of the Royal Astronomical Society, 338(4), 957-961. Oxford University Press, Physical Review Letters, 89(15). AMER PHYSICAL SOC
Publication Year :: 2003
Publisher :: Oxford University Press (OUP), 2003.
Abstract: A new two-image gravitational lens system has been discovered as a result of the Cosmic Lens All-Sky Survey (CLASS). Radio observations with the VLA, MERLIN and the VLBA at increasingly higher resolutions all show two components with a flux density ratio of ~7:1 and a separation of 1.34". Both components are compact and have the same spectral index. Followup observations made with the VLA at 8.4 GHz show evidence of a feature to the south-east of the brighter component and a corresponding extension of the weaker component to the north-west. Optical observations with the WHT show ~1.7" extended emission aligned in approximately the same direction as the separation between the radio components with an R-band magnitude of 21.8 +/- 0.4.<br />6 pages, 5 figures, accepted by MNRAS

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