Mark Lacy (NRAO), Susan Ridgway (CTIO), Andreea Petric (SSC/Caltech),
Anna Sajina (Haverford), Tanya Urrutia (SSC/Caltech), Duncan Farrah
(Sussex)

The current popular paradigm for the co-evolution of massive galaxies
and black holes, in which galaxy mergers trigger both starbursts and
quasar activity, predicts a large fraction of dust obscured quasars,
particularly at z>~2.  Candidates for such objects are easy to select
from Spitzer mid-infrared surveys, but obtaining redshifts (and hence
luminosities and space densities) is more problematic. We will present
preliminary results from the follow up of ~500 AGN and quasar
candidates from Spitzer which show that a large population of highly
luminous, high redshift obscured quasars exists, constituting the
majority of the quasar population at z>~2.5. We will also show that
many of these objects are associated with ULIRG-level starburst
activity, and discuss the potential for follow-up with ALMA and the
EVLA.