1305.0998 (L. C. C. Lin et al.)

Discovery of X-ray Pulsation from the Geminga-like Pulsar PSR J2021+4026    [PDF]

L. C. C. Lin, C. Y. Hui, C. P. Hu, J. H. K. Wu, R. H. H. Huang, L. Trepl, J. Takata, K. A. Seo, Y. Wang, Y. Chou, K. S. Cheng

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.

View original: http://arxiv.org/abs/1305.0998