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Powerful, obscured active galactic nuclei among X-ray hard, optically dim serendipitous Chandra sources |
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| Authors: | P Gandhi C S Crawford A C Fabian R M Johnstone |
| Institution: | Institute of Astronomy, Madingley Road, Cambridge CB3 0HA;European Southern Observatory, Alonso de Cordova 3107, Santiago 19, Chile |
| Abstract: | |
| Keywords: | galaxies: active infrared: galaxies X-rays: diffuse background X-rays: galaxies |