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arXiv · 1010.1354

Detection of an X-ray Pulsation for the Gamma-ray Pulsar Centered in CTA 1

Lupin C. C. Lin·Regina H. H. Huang·Jumpei Takata·Chorng-Yuan Hwang·Albert K. H. Kong·Chung-Yue Hui
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Abstract

We report the detection of X-ray pulsations with a period of ~315.87 ms from the 2009 XMM-Newton observation for the radio-quiet gamma-ray pulsar, LAT PSR J0007+7303, centered in the supernova remnant CTA 1. The detected pulsed period is consistent with the gamma-ray periodicity at the same epoch found with the Fermi Gamma-ray Space Telescope. The broader sinusoidal structure in the folded light curve of the X-ray emission is dissimilar to that of the gamma-ray emission, and the phase of the peak is about 0.5 shifting from the peak in the gamma-ray bands, indicating that the main component of the X-rays originates from different sites of the pulsar. We conclude that the main component of the X-ray pulsation is contributed by the thermal emission from the neutron star. Although with a significantly different characteristic age, PSR~J0007+7303 is similar to Geminga in emission properties of X-rays and gamma-rays; this makes PSR J0007+7303 the second radio-quiet gamma-ray pulsar with detected X-ray pulsations after Geminga.

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Lupin C. C. Lin, Regina H. H. Huang, Jumpei Takata, Chorng-Yuan Hwang, Albert K. H. Kong, Chung-Yue Hui. 2010-10-09. Detection of an X-ray Pulsation for the Gamma-ray Pulsar Centered in CTA 1. https://doi.org/10.1088/2041-8205%2F725%2F1%2Fl1

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