  A graphene superlattice is formed by a one-dimensional periodic potential and
is characterized by the emergence of new Dirac points in the electronic
structure. The group velocity of graphene's massless Dirac fermions at the new
points is drastically reduced, resulting in a measurable effect in the
conductance spectroscopy. We show here that tunnel spectroscopy using a
superconducting hybrid junction is more sensitive to the formation of Dirac
points in the spectrum of graphene superlattices due to the additional
contribution of Andreev processes. We examine the transport properties of a
graphene-based superlattice--superconductor hybrid junction and demonstrate
that a superlattice potential can coexist with proximity-induced
superconducting correlations. Both effects contribute to change graphene's
spectrum for subgap energies and, as a result, the normalized tunneling
conductance features sharp changes for voltages proportional to the energy
separation between the original and the newly generated Dirac points.
