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The PG X-Ray QSO Sample: Links between the Ultraviolet–X-Ray Continuum and Emission Lines
(IOP Publishing, 1999)
Two sets of relationships relate QSO UV to soft X-ray continua with the broad-line region. These are (i) the Baldwin relationships, which are inverse relationships between the broad-line equivalent width and the continuum ...
Investigation of the Relation between the Spectral Energy Distributions and the Emission Lines in Low‐Redshift Quasars
(IOP Publishing, 1999)
We investigate the relations between the observed emission-line strengths, widths, and continuum properties of a sample of 41 low-redshift (z<1) quasars for which contemporaneous IR/soft X-ray spectral energy distributions ...