  We study the production of prompt photons in strongly coupled
out-of-equilibrium Super Yang-Mills plasma using the AdS/CFT correspondence.
Our goal is to determine the photon emission spectrum at different stages of a
thermalization process, which is modeled via the gravitational collapse of a
thin spherical shell in AdS$_5$ space. Particular emphasis is placed on the
limit of large frequencies, which we are able to treat analytically.
