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American Astronomical Society, Astrophysical Journal, 1(653), p. 152-158, 2006

DOI: 10.1086/508533

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The Mass of the Black Hole in the Seyfert 1 Galaxy NGC 4593 from Reverberation Mapping

Journal article published in 2006 by Kelly D. Denney, Misty C. Bentz, Bradley M. (Bradley M.) Peterson, Richard W. Pogge, Edward M. Cackett, Matthias Dietrich, Jeffrey K. J. Fogel, Himel Ghosh, Keith D. Horne, Charles Kuehn, Takeo Minezaki, Christopher A. Onken ORCID, Vladimir I. Pronik, Douglas O. Richstone, Sergey G. Sergeev and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We present new observations leading to an improved black hole mass estimate for the Seyfert 1 galaxy NGC 4593 as part of a reverberation-mapping campaign conducted at the MDM Observatory. Cross-correlation analysis of the H_beta emission-line light curve with the optical continuum light curve reveals an emission-line time delay of 3.73 (+-0.75) days. By combining this time delay with the H_beta line width, we derive a central black hole mass of M_BH = 9.8(+-2.1)x10^6 M_sun, an improvement in precision of a factor of several over past results. ; Comment: 22 pages, 3 tables, 5 figures, accepted for publication in ApJ