AAS 203rd Meeting, January 2004
Session 63 AGN
Oral, Tuesday, January 6, 2004, 10:00-11:30am, Regency VII

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[63.02] The AGN Contribution to the Low Redshift Ultraviolet Background

J. E. Scott, G. A. Kriss (STScI), M. S. Brotherton (U. Wyoming), R. F. Green (NOAO/KPNO), J. Hutchings (HIA/NRC), J. M. Shull (U. Colorado), W. Zheng (JHU)

We have constructed a composite extreme ultraviolet spectrum of AGN with z < 1 using archival spectra from The Far Ultraviolet Spectroscopic Explorer. This composite is significantly harder than the composite QSO spectrum calculated from Hubble Space Telescope spectra of QSOs with z > 0.33. We discuss how we use this composite spectrum in combination with an AGN luminosity function and a model for the opacity of the intervening intergalactic medium to calculate the AGN contribution to the low-redshift ultraviolet background radiation field.

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Bulletin of the American Astronomical Society, 35#5
© 2003. The American Astronomical Soceity.