The anisotropy of cosmic rays of galactic origin above 1017eV

By following the trajectories of protons in the galaxy the authors predict the detailed form of the anisotropy of ultrahigh energy cosmic rays of galactic origin for given magnetic fields and source distributions. Three specific magnetic field models based on interpretations of the observational data are used and they consider sources uniformly distributed throughout the galactic disc or spiral arms or concentrated at the galactic centre. Data on the arrival directions of extensive air showers are then compared with the predicted distributions for these models, and, assuming that metagalactic cosmic rays are isotropic, upper limits are given for the fraction of cosmic rays of galactic origin.