X-ray surveys hold the key to many outstanding problems in AGN reseach,
including studies of the luminosity function, evolution and emission
mechanisms of AGN.  Of particular interest at the moment is the origin
of the X-ray background, and what fraction of its emission is caused
by active/high luminosity or low luminosity objects. The ROSAT PSPC is
the most sensitive intrument we yet have to survey the X-ray sky, and
we are in the process of compiling a complete X-ray selected sample
of objects down to a flux limit of 3 x 10^-14 ergs/cm2/s.  This
threshold is an order of magnitude lower than that achieved by the
EMSS.  This survey is the RIXOS survey, and it together with deep
ROSAT surveys are showing that narrow line galaxies such as Seyfert 2's
LINERS and starburst galaxies are an important fraction of the extra-
galactic population at the lowest flux levels.  In order to fully
understand these objects, we need as wide a range of data as possible.
IR data will enable us to study in more detail the continuum emission
mechanisms in these objects, and we will relate the IR emission to the
optical and X-ray emission.  Our sample consists of those objects at
the faint X-ray fluxes, but these sources are actually at the top end
of the luminosity distribution for narrow line galaxies.  We therefore
will not only be able to study these objects and their continuum
emission, but we will be able to compare these objects with the lower
luminosity galaxies which are more normal.  Further, since we have a
much larger range of redshifts in our sample than has been accesible
by other surveys, we will be able to look for evolutionary effects,
and relate the narrow line galaxies to more active objects over a wide
range of redshifts.