  The thermal photon emission rate is determined by the spatially transverse,
in-medium spectral function of the electromagnetic current. Accessing the
spectral function using Euclidean data is, however, a challenging problem due
to the ill-posed nature of inverting the Laplace transform. In this
contribution, we present the first results on implementing the proposal of
directly computing the analytic continuation of the retarded correlator at
fixed, vanishing virtuality of the photon via the calculation of the
appropriate Euclidean correlator at imaginary spatial momentum. We employ two
dynamical O(a)-improved Wilson fermions at a temperature of 250 MeV.

High Energy Physics - Lattice