Department of Astronomy,Beijing Normal University,Beijing 100875;
Department of Astronomy,Beijing Normal University,Beijing 100875;
Department of Astronomy,Beijing Normal University,Beijing 100875;
National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012;
Department of Astronomy,Beijing Normal University,Beijing 100875;
Kitt Peak National Observatory,NOAO,Tucson,AZ85726-6732,USA;
Max-Planck-Institute für Extraterrestrische Physik,D-85740 Garching,Germany;
galaxies:active:individual(field f836)-X-rays:galaxies:quasars;