![Quasar / Radio astronomy / Physics / Gravitational lens / Active galactic nucleus / Galaxy / Twin Quasar / Cloverleaf quasar / Astronomy / General relativity / Gravitational lensing Quasar / Radio astronomy / Physics / Gravitational lens / Active galactic nucleus / Galaxy / Twin Quasar / Cloverleaf quasar / Astronomy / General relativity / Gravitational lensing](https://www.pdfsearch.io/img/d778a5cfe4afc962fe84fe2ce8dd610f.jpg)
| Document Date: 2015-02-12 07:18:48 Open Document File Size: 36,94 KBShare Result on Facebook
Country Switzerland / Germany / / Facility Bonn University / University of Maryland / / Organization University of Maryland / Ecole Polytechnique Federale de Lausanne / National Aeronautics and Space Administration / Bonn University / / Person Frederic Courbin / A. Mahabal / / ProvinceOrState Maryland / / PublishedMedium Astronomy and Astrophysics / / Technology ESA / / URL www.tcpdf.org / http /
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