I am trying to find the latest and most accurate data on galactic core black hole measured masses. The best collection of data that I have on black holes is at http://www.johnstonsarchive.net/rela.../bhctable.html but it is dated at 2004, so I suspect there will be additional data available, and possibly some improvements in accuracy.

The reason for this is to test my prediction that Harmonics Theory can explain black hole masses as being related to pervading oscillations periods that are detected in many phenomena. See Harmonics Theory discussion and this post in another thread on the present analysis. I should mention that the periods concerned are related to the structure of the solar system and to solar oscillations. The inner planets are consistent with 3 and 6 minute period waves centred on the Sun and the outer ones with 80 and 180 minute periods. These do show up in the BH data to date.

There are several methods used to estimate black hole masses (reverberation mapping, emission-line width, Mb-sigma), some more indirect than others. When applied to the same galaxies, they don't always (or often) yield the same mass for the black hole.

There's been quite a bit of action in this area lately, as people have been trying to pin down the form of the Mb-sigma relationship, so you can find quite a bit of data published in tabular form in the recent literature. Go to ADS

http://adsabs.harvard.edu/abstract_service.html

and use the "Abstract words" box to search for terms like

black hole supermassive galactic mass velocity dispersion

You should be able to find what you seek in a few hours.

Good luck!

Thanks, that does give additional data. However I do not want to do a data gathering exercise because then I may be accused of selecting data in testing my hypothesis. For that reason I am looking for a more recent database that is already made.

As SM said, or implied, you probably won't find such a thing, if only because the SMBH mass estimates depend on the methods used to make them, and, consequently, any list maker trying to present more than just a summary sweep through relevant papers would likely need to address some non-trivial consistency issues, especially wrt estimates of uncertainty.