  We analytically compute the out-of-equilibrium direct photon production rate
and electric conductivity, in a strongly coupled and expanding Bjorken plasma,
from holography. Our results are valid at late times where the expanding plasma
asymptotes Bjorken hydrodynamics. The out-of-equilibrium rates are
substantially harder and larger, early on in the Bjorken expansion phase.

High Energy Physics - Phenomenology;High Energy Physics - Theory;Nuclear Theory