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The XMM-SSC survey of hard-spectrum XMM–Newton sources – I. Optically bright sources
Authors:M. J. Page  I. Lehmann  Th. Boller  M. G. Watson  T. Dwelly  S. Hess  I. Matute  N. S. Loaring  S. Rosen  H. Ziaeepour  A. Schwope  G. Lamer  F. J. Carrera  J. Tedds  R. Della Ceca  P. Severgnini  R. G. McMahon   W. Yuan
Affiliation:Mullard Space Science Laboratory, University College London, Holmbury St Mary, Dorking, Surrey RH5 6NT;Max-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse, Postfach 1312, 85741 Garching, Germany;Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH;School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ;South African Astronomical Observatory, Observatory, 7935 Cape Town, South Africa;Astrophysikalisches Institut Potsdam (AIP), An der Sternwarte 16, 14482 Potsdam, Germany;Instituto de Física de Cantabria (CSIC –Universidad de Cantabria), 39005 Santander, Spain;INAF –Osservatorio Astronomico di Brera, via Brera 28, I-20121 Milano, Italy;University of Cambridge, Institute of Astronomy, Madingley Road, Cambridge CB3 0HA;National Astronomical Observatory of China/Yunnan Observatory, Kunming 650011, PO Box 110, Yunnan, China
Abstract:
Keywords:galaxies: active    X-rays: galaxies
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