The contribution of nearby supernova remnants on the cosmic ray flux at
  Earth
  We consider anisotropic diffusion of Galactic cosmic rays in the Galactic
magnetic field, using the Jansson-Farrar model for the field. In this paper we
investigate the influence of source position on the cosmic ray flux at Earth in
two ways: [1] by considering the contribution from cosmic ray sources located
in different intervals in Galacto-centric radius, and [2] by considering the
contribution from a number of specific and individual close-by supernova
remnants. Our calculation is performed by using a fully three-dimensional
stochastic method. This method is based on the numerical solution of a set of
stochastic differential equations, equivalent to Ito formulation, that
describes the propagation of the Galactic cosmic rays.
