ar X iv : a st ro - p h / 06 05 03 8 v 1 1 M ay 2 00 6 The Mass of the Central Black Hole in the Seyfert Galaxy NGC 4151

Abstract

In order to improve the reverberation-mapping based estimate of the mass of the central supermassive black hole in the Seyfert 1 galaxy NGC 4151, we have reanalyzed archival ultraviolet monitoring spectra from two campaigns undertaken with the International Ultraviolet Explorer. We measure emission-line time delays for four lines, C IVλ1549, He IIλ1640, C… (More)

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