Gravitational Focusing and Substructure Effects on the Rate Modulation
  in Direct Dark Matter Searches
  We study how gravitational focusing (GF) of dark matter by the Sun affects
the annual and biannual modulation of the expected signal in non-directional
direct dark matter searches, in the presence of dark matter substructure in the
local dark halo. We consider the Sagittarius stream and a possible dark disk,
and show that GF suppresses some, but not all, of the distinguishing features
that would characterize substructure of the dark halo were GF neglected.
