Abstract
Luminosity functions of Seyfert 1 active galactic nuclei in the [OIII] λ5007 Å forbidden line are derived from Sloan Digital Sky Survey data (Data Release 7). Special attention is paid to the peculiar class of narrow-line Seyfert 1 (NLSy1) galaxies, whose optical broad, permitted lines are relatively narrow (FWHM ≤ 2000 km/s). A new technique for obtaining an emission-line luminosity function that is able to take into account density variations due to the large-scale structure of the Universe, among other factors, is discussed. The derived luminosity functions are compared with those for other types of active galactic nuclei using available published data. The X-ray luminosity function predicted using our data demonstrates good agreement with observations.
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