A Composite Extreme Ultraviolet QSO Spectrum from FUSE
  The Far Ultraviolet Spectroscopic Explorer (FUSE) has surveyed a large sample (> 100) of active galactic nuclei in the low redshift universe (z < 1). Its response at short wavelengths makes it possible to measure directly the EUV spectral shape of QSOs and Seyfert 1 galaxies at z < 0.3. Using archival FUSE spectra, we form a composite extreme ultraviolet (EUV) spectrum of QSOs at z < 1 and compare it to UV/optical composite spectra of QSOs at higher redshift, particularly the composite spectrum from archival Hubble Space Telescope spectra. 
Jennifer E. Scott (1), Gerard A. Kriss (1,2), Michael Brotherton (3),   Richard F. Green (4), John Hutchings (5), J. Michael...