  The low-mass end of the supermassive black hole mass function is unknown and
difficult to determine. Here we discuss our successful program to find active
nuclei of late type "normal" galaxies using X-ray detections and
multiwavelength identifications. We conclude that most of the Chandra detected
nuclear X-ray sources are AGNs. We then outline methods of black hole mass
determination when broad emission lines are unobservable.

Astrophysics