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DETECTION OF AN X-RAY PULSATION FOR THE GAMMA-RAY PULSAR CENTERED IN CTA 1

Authors :
R. H. H. Huang
Albert K. H. Kong
Lupin C. C. Lin
Jumpei Takata
Chorng Yuan Hwang
C. Y. Hui
Source :
The Astrophysical Journal. 725:L1-L5
Publication Year :
2010
Publisher :
American Astronomical Society, 2010.

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.<br />7 pages, 4 figures and 1 table; accepted by ApJL

Details

ISSN :
20418213 and 20418205
Volume :
725
Database :
OpenAIRE
Journal :
The Astrophysical Journal
Accession number :
edsair.doi.dedup.....0fcc3b70722cfd8d08d4ac2f01c6ce60