Journal
ASTROPHYSICAL JOURNAL
Volume 572, Issue 2, Pages 746-752Publisher
IOP PUBLISHING LTD
DOI: 10.1086/340351
Keywords
galaxies : active; galaxies : individual (NGC 3783); galaxies : nuclei; galaxies : Seyfert; ultraviolet : galaxies
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Improved analysis of ultraviolet and optical monitoring data on the Seyfert 1 galaxy NGC 3783 provides evidence for the existence of a supermassive, (8.7 +/- 1.1) x 10(6) M-., black hole in this galaxy. By using recalibrated spectra from the International Ultraviolet Explorer satellite and ground-based optical data, as well as refined techniques of reverberation mapping analysis, we have reduced the statistical uncertainties in the response of the emission lines to variations in the ionizing continuum. The different time lags in the emission-line responses indicate a strati cation in the ionization structure of the broad-line region and are consistent with the virial relationship suggested by the analysis of similar active galaxies.
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