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We here estimate the mass M of the central object in five active galacticnuclei (AGNs), using the most recent reverberation data obtained by the AGNWatch Consortium. The cross-correlation function (CCF) centroids of the broadLy-alpha 1216 and C IV 1549 lines are used to estimate the size of thebroad-line region (BLR) in these sources. We calculate the velocity dispersionsof these lines in the root mean square (rms) spectra and then use our resultsto estimate M. We argue that our technique of calculating the velocitydispersion should work in the general case of an arbitrary line profile, unlikemethods that depend on the measurement of the full-width at half-maximum (FWHM)of the broad line. We also show that our results agree with the FWHM method inthe limit of a normal (Gaussian) line profile. The masses calculated here areconsiderably smaller than those calculated with the previous generation ofreverberation data.Comment: 13 pages, 2 figure

Determination of the Central Mass in Active Galactic Nuclei Using Cross‐Correlation Lags and Velocity Dispersions