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For refcode 1998ApJ...501...82P:
Retrieve 9 NED objects in this reference.
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Copyright by American Astronomical Society. Reproduced by permission
1998ApJ...501...82P Optical Continuum and Emission-Line Variability of Seyfert 1 Galaxies BRADLEY M. PETERSON, IGNAZ WANDERS, RAY BERTRAM, JAMES F. HUNLEY, RICHARD W. POGGE, AND R. MARK WAGNER Department of Astronomy, The Ohio State University, 174 West 18th Avenue, Columbus, OH 43210-1106; peterson@astronomy.ohio-state.edu, jhunley@astronomy.ohio-state.edu, pogge@astronomy.ohio-state.edu Received 1997 November 10; accepted 1998 February 6 ABSTRACT We present the light curves obtained during an 8 yr program of optical spectroscopic monitoring of nine Seyfert 1 galaxies: 3C 120, Akn 120, Mrk 79, Mrk 110, Mrk 335, Mrk 509, Mrk 590, Mrk 704, and Mrk 817. All objects show significant variability in both the continuum and emission-line fluxes. We use cross-correlation analysis to derive the sizes of the broad H{beta}-emitting regions based on emission-line time delays, or lags. We successfully measure time delays for eight of the nine sources and find values ranging from about 2 weeks to a little over 2 months. Combining the measured lags and widths of the variable parts of the emission lines allows us to make virial mass estimates for the active nucleus in each galaxy. The virial masses are in the range 10^7^-10^8^ M_sun_. Subject headings: galaxies: active-galaxies: Seyfert ========================================================================== 1999ApJ...511..513P ERRATUM In the paper "Optical Continuum and Emission-Line Variability of Seyfert 1 Galaxies" by Bradley M. Peterson et al. (ApJ, 501, 82 [1998]), a typesetting error resulted in columns (2) and (5) of Table 5 and column (4) of Table 7 having incorrect entries. The corrected tables are reproduced below in their entirety. The Press apologizes for any inconvenience that might have been caused by this error.
Retrieve 9 NED objects in this reference.
Please click here for ADS abstract

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