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The XMM–Newton/2dF survey – VII. Is there any X-ray absorption in optically selected QSOs? |
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| Authors: | A. Akylas A. Georgakakis I. Georgantopoulos |
| Affiliation: | Institute of Astronomy &Astrophysics, National Observatory of Athens, I. Metaxa B. Pavlou, Penteli, Athens 15236, Greece;Physics Department University of Athens, Panepistimiopolis, Zografos, Athens 15783, Greece |
| Abstract: | |
| Keywords: | galaxies: active quasars: general X-rays: general |