DETECTION OF AN X-RAY PULSATION FOR THE GAMMA-RAY PULSAR CENTERED IN CTA 1
- Graduate Institute of Astronomy, National Central University, Jhongli 32001, Taiwan (China)
- Institute of Astronomy and Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan (China)
- Department of Physics, University of Hong Kong, Hong Kong (China)
We report the detection of X-ray pulsations with a period of {approx}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.
- OSTI ID:
- 21454925
- Journal Information:
- Astrophysical Journal Letters, Vol. 725, Issue 1; Other Information: DOI: 10.1088/2041-8205/725/1/L1; ISSN 2041-8205
- Country of Publication:
- United States
- Language:
- English
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