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X-ray bright optically inactive galaxies in XMM–Newton/Sloan Digital Sky Survey fields: more diluted than absorbed? |
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| Authors: | I. Georgantopoulos A. Georgakakis |
| Affiliation: | Institute of Astronomy and Astrophysics, National Observatory of Athens, I. Metaxa &B. Pavlou, 15236, Athens, Greece |
| Abstract: | |
| Keywords: | galaxies: active quasars: general X-rays: general |