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Published online by Cambridge University Press: 03 June 2010
In this work, we use the low-redshift, narrow-line Seyfert 1 (NLS1) galaxies Ark 564 and I Zw 1 as laboratories for modeling the Fe ii emission features in the wavelength range 1200–6700 Å. We utilize data acquired with the Hubble Space Telescope and the 2.7-m telescope at McDonald Observatory.