XMM-Newton observation of PSR B2224+65 and its jet
  We have investigated the pulsar PSR B2224+65 and its X-ray jet with XMM-Newton. Apart from the long X-ray jet which is almost perpendicular to the direction of proper motion, a putative extended feature at the pulsar position, which oriented in the opposite direction of the proper motion, is also suggested by this deep X-ray imaging. Non-detection of any coherent X-ray pulsation disfavors the magnetospheric origin of the X-rays observed from the position of PSR B2224+65 and hence suggest that the interpretation of pulsar wind nebula is more viable. We have also probed the origin of PSR B2224+65 and identified a runaway star, which possibly originated from the Cygnus OB9 association, as a candidate for the former binary companion of the neutron star's progenitor. 
C. Y. Hui (1), R. H. H. Huang (2), L. Trepl (3), N. Tetzlaff (3), J.   Takata (4), E. M. H. Wu (4), K. S. Cheng (4) ((1) Chu...
astro-ph.HE