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Paper: Asymmetry of the Wide Hα Component in the Spectrum of NGC 4151 from 1976 to 1986, and the Outburst in Activity from 1990 to 2000
Volume: 360, AGN Variability from X-Rays to Radio Waves
Page: 251
Authors: Valiullin, R.R.; Denissyuk, E.D.; Gaisina, V.N.
Abstract: Spectra of the Seyfert 1 galaxy NGC 4151 were obtained from 1976 to 2003 and measured by the authors. An analysis of Hα profile shows the significant increase of F(Hα)blue / F(Hα)red ratio over the period 1976 – 1986. It is assumed that there is a direct correlation between F(Hα)blue / F(Hα)red variations and the total activity of NGC 4151.
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