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arXiv · 1305.0998

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

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
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Abstract

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.

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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. 2013-05-05. Discovery of X-ray Pulsation from the Geminga-like Pulsar PSR J2021+4026. https://doi.org/10.1088/2041-8205%2F770%2F1%2Fl9

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