A REVERBERATION-BASED BLACK HOLE MASS FOR MCG-06-30-15

We present the results of a reverberation campaign targeting MGC-06-30-15. Spectrophotometric monitoring and broad-band photometric monitoring over the course of four months in spring 2012 allowed a determination of a time delay in the broad H beta emission line of tau = 5.3 +/- 1.8 days in the rest frame of the active galactic nucleus ( AGN). Combined with the width of the variable portion of the emission line, we determine a black hole mass of M-BH = (1.6 +/- 0.4) x 10 (6) M-circle dot. Both the H beta time delay and the black hole mass are in good agreement with expectations from the R-BLR-L and M-BH-sigma star relationships for other reverberation-mapped AGNs. The H beta time delay is also in good agreement with the relationship between H beta and broad-band near-IR delays, in which the effective size of the broad-line region is similar to 4-5 times smaller than the inner edge of the dust torus. Additionally, the reverberation-based mass is in good agreement with estimates from the scaling relationship of the break in the X-ray power spectral density, and with constraints based on stellar kinematics derived from integral field spectroscopy of the inner similar to 0.5 kpc of the galaxy.