The XMM-Newton view of the radio-quiet neutron star 1E 1207.4-5209
  We have observed the radio-quiet X-ray pulsar 1E 1207.4-5209 with the high throughput EPIC cameras onboard XMM-Newton. The spectrum of this peculiar source is characterized by two broad absorption features which present significant substructures and show a clear phase-dependence. We believe that these features represent a strong evidence for the presence of a magnetized atmosphere containing heavy elements. 
A. De Luca (1,2), S. Mereghetti (1), P.A. Caraveo (1), R.P. Mignani   (3), W. Becker (4) and G.F. Bignami (5) ((1) IASF/CNR ...