We present Chandra observations of 12 galaxies that contain supermassive black holes with dynamical mass measurements .
Each galaxy was observed for 30 ksec and resulted in a total of 68 point source detections in the target galaxies including supermassive black hole sources , ultraluminous X-ray sources , and extragalactic X-ray binaries .
Based on our fits of the X-ray spectra , we report fluxes , luminosities , Eddington ratios , and slope of the power-law spectrum .
Normalized to the Eddington luminosity , the 2–10 keV band X-ray luminosities of the SMBH sources range from 10 ^ { -8 } to 10 ^ { -6 } , and the power-law slopes are centered at \sim 2 with a slight trend towards steeper ( softer ) slopes at smaller Eddington fractions , implying a change in the physical processes responsible for their emission at low accretion rates .
We find 20 ULX candidates , of which six are likely ( > 90 \% chance ) to be true ULXs .
The most promising ULX candidate has an isotropic luminosity in the 0.3–10 keV band of 1.0 _ { -0.3 } ^ { +0.6 } \times 10 ^ { 40 } \mathrm { erg s ^ { -1 } } .

\pdfstringdef \BKM @ title Abstract