  Recently, two of us have found numerically rotating Ellis wormholes as
solutions of 4-dimensional Einstein gravity coupled to a phantom field. In this
paper, we investigate possible observational signatures to identify similar
objects in the Universe. These symmetric wormholes have a mass and are compact,
so they may look like black holes. We study the iron line profile in the X-ray
reflection spectrum of a thin accretion disk around rotating Ellis wormholes
and we find some specific observational signatures that can be used to
distinguish these objects from Kerr black holes. We simulate some observations
with XIS/Suzaku assuming typical parameters for a bright AGN and we conclude
that current X-ray missions cannot apply strong constraints.
