Evidence for a Supermassive Black Hole in the S0 Galaxy NGC 3245

The S0 galaxy NGC 3245 contains a circumnuclear disk of ionized gas and dust nwith a radius of 1.1 (110 pc), making it an ideal target for dynamical studies nwith the Hubble Space Telescope. We have obtained spectra of the nuclear disk nwith the Space Telescope Imaging Spectrograph, using an 0.2 -wide slit at five nparallel positions. Measurements of the ..