The Host Galaxy of the Dwarf Seyfert UGC 06728
  We present multi-color high-resolution imaging of the host galaxy of the
dwarf Seyfert UGC 06728. As the lowest-mass black hole to be described with
both a direct mass constraint and a spin constraint, UGC 06728 is an important
source for comparison with black hole evolutionary models, yet little is known
about the host galaxy. Using Hubble Space Telescope imaging in the optical and
near-infrared, we find that UGC 06728 is a barred lenticular (SB0) galaxy with
prominent ansae at the ends of the bar. We cleanly separated the AGN from the
resolved galaxy with two-dimensional image decompositions, thus allowing
accurate surface brightness profiles to be derived in all filters from the
outer edge of the galaxy all the way into the nucleus. Based on a sample of 51
globular cluster candidates identified in the images, the globular cluster
luminosity function predicts a distance to UCG 06728 of $32.5\pm3.5$ Mpc.
Combining the galaxy photometry with the distance estimate, we derive a
starlight-corrected AGN luminosity, the absolute magnitude of the galaxy, and a
constraint on the galaxy stellar mass of $\log M_{\star}/M_{\odot}=9.9\pm0.2$.
