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Title:
The Mass of the Black Hole in the Seyfert 1 Galaxy NGC 4593 from Reverberation Mapping
Authors:
Denney, Kelly D.; Bentz, Misty C.; Peterson, Bradley M.; Pogge, Richard W.; Cackett, Edward M.; Dietrich, Matthias; Fogel, Jeffrey K. J.; Ghosh, Himel; Horne, Keith D.; Kuehn, Charles; Minezaki, Takeo; Onken, Christopher A.; Pronik, Vladimir I.; Richstone, Douglas O.; Sergeev, Sergey G.; Vestergaard, Marianne; Walker, Matthew G.; Yoshii, Yuzuru
Affiliation:
AA(Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210; , , , , , .), AB(Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210; , , , , , .), AC(Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210; , , , , , .), AD(Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210; , , , , , .), AE(School of Physics and Astronomy, University of St. Andrews, Fife, KY16 9SS, Scotland, UK; , .), AF(Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210; , , , , , .), AG(Department of Astronomy, University of Michigan, Ann Arbor, MI 48109-1090 , , .), AH(Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210; , , , , , .), AI(School of Physics and Astronomy, University of St. Andrews, Fife, KY16 9SS, Scotland, UK; , .), AJ(Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210; , , , , , .; Current address: Department of Physics and Astronomy, 3270 Biomedical Physical Sciences Building, Michigan State University, East Lansing, MI 48824; .), AK(Institute of Astronomy, School of Science, University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo 181-0015, Japan; , .), AL(Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210; , , , , , .; Current address: National Research Council Canada, Herzberg Institute of Astrophysics, 5071 West Saanich Road, Victoria, BC V9E 2E, Canada; .), AM(Crimean Astrophysical Observatory, Nauchny Post Office, 98409 Crimea, Ukraine; , .; Isaak Newton Institute of Chile, Crimean Branch, Ukraine.), AN(Department of Astronomy, University of Michigan, Ann Arbor, MI 48109-1090 , , .), AO(Crimean Astrophysical Observatory, Nauchny Post Office, 98409 Crimea, Ukraine; , .; Isaak Newton Institute of Chile, Crimean Branch, Ukraine.), AP(Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721; .), AQ(Department of Astronomy, University of Michigan, Ann Arbor, MI 48109-1090 , , .), AR(Institute of Astronomy, School of Science, University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo 181-0015, Japan; , .; Research Center for the Early Universe, School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.)
Publication:
The Astrophysical Journal, Volume 653, Issue 1, pp. 152-158. (ApJ Homepage)
Publication Date:
12/2006
Origin:
UCP
ApJ Keywords:
Galaxies: Active, Galaxies: Nuclei, Galaxies: Seyfert
DOI:
10.1086/508533
Bibliographic Code:
2006ApJ...653..152D

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 Hβ emission-line light curve with the optical continuum light curve reveals an emission-line time delay of τcent=3.73+/-0.75 days. By combining this time delay with the Hβ line width, we derive a central black hole mass of MBH=(9.8+/-2.1)×106 Msolar, an improvement in precision of a factor of several over past results.
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