Corpus ID: 15158072

CLASS B0827+525: 'Dark lens' or binary radio-loud quasar?

  title={CLASS B0827+525: 'Dark lens' or binary radio-loud quasar?},
  author={L{\'e}on V. E. Koopmans and A. G. de Bruyn and Christopher D. Fassnacht and Daniel R. Marlow and David Joseph Rusin and Roger D. Blandford and I. W. A. Browne and Phillip Helbig and Neal J Jackson and Steven Theodore Myers and T. J. Pearson and Anthony C. S. Readhead and Peter N. Wilkinson and Emily Xanthopoulos and Herzberg Institute and Nfra and Caltech and Nrao and Jodrell Bank Observatory and Upenn},
  journal={Astronomy and Astrophysics},
We present radio, optical, near-infrared and spec troscopic observations of the source B0827+525. We consider this source as the best candidate from the Cosmic Lens All-Sky Survey (CLASS) for a 'dark-lens' system or binary radio-loud quasar. The system consists of two radio components with somewhat different spectral indices, separated by 2.815 arcsec. VLBA observations show that each component has substructure on a scale of a few mas. A deep K-band exposure with the W.M. Keck-II Telescope… Expand

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Gravitational Lensing: Recent Progress and Future Goals*
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, to appear in “ Gravitational Lensing : Recent Progress and Future Goals ”