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

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

2002-10-10

arxiv.org/abs/astro-ph/0210234v1

Mon.Not.Roy.Astron.Soc. 338 (2003) 957

Astronomy and Astrophysics

Astrophysics

6 pages, 5 figures, accepted by MNRAS

Scientific paper

10.1046/j.1365-8711.2003.06138.x

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.

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