  This optical catalogue combines the all-sky USNO-B1.0/A1.0 and most-sky APM
catalogues, plus overlays of SDSS optical data, into a single all-sky map
presented in a sparse binary format which is easily downloaded at 9Gb zipped.
Total count is 1,163,237,190 sources and each has J2000 astrometry, red & blue
magnitudes with PSFs and variability indicator, and flags for proper motion,
epoch, and source survey & catalogue for each of the photometry and astrometry.
The catalogue is available on the PASA datastore at
http://dx.doi.org/10.4225/50/5807fbc12595f .
