%0 Journal Article
%T Discovery of X-ray Pulsation from the Geminga-like Pulsar PSR J2021+4026
%A L. C. C. Lin
%A C. Y. Hui
%A C. P. Hu
%A J. H. K. Wu
%A R. H. H. Huang
%A L. Trepl
%A J. Takata
%A K. A. Seo
%A Y. Wang
%A Y. Chou
%A K. S. Cheng
%J Physics
%D 2013
%I arXiv
%R 10.1088/2041-8205/770/1/L9
%X We report the discovery of X-ray periodicity of ~265.3 ms from a deep XMM-Newton observation of the radio-quiet gamma-ray pulsar, PSR J2021+4026, located at the edge of the supernova remnant G78.2+2.1 (gamma-Cygni).The detected frequency is consistent with the gamma-ray pulsation determined by the observation of Fermi Gamma-ray Space Telescope at the same epoch. The X-ray pulse profile resembles the modulation of hot spot on the surface of the neutron star. The phase-averaged spectral analysis also suggests that the majority of the observed X-rays have a thermal origin. This is the third member in the class of radio-quiet pulsars with the significant pulsations detected from both X-rays and gamma-ray regimes.
%U http://arxiv.org/abs/1305.0998v1