Reverberation Mapping of the Optical Continua of 57 MACHO Quasars
  Autocorrelation analyses of the optical continua of 57 of the 59 MACHO
quasars reveal structure at proper time lags of 544 +- 5.2 days with a standard
deviation of 77 light days. Interpreted in the context of reverberation from
elliptical outflow winds as proposed by Elvis (2000) [1], this implies an
approximate characteristic size scale for winds in the MACHO quasars of 544 +-
5.2 light days. The internal structure variable of these reflecting outflow
surfaces is found to be 11.87 degrees +- 0.40 degrees with a standard deviation
of 2.03 degrees.
