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

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.

7 pages, 4 figures and 1 table; accepted by ApJL

References in corpus (4)

• Detection of 16 Gamma-Ray Pulsars Through Blind Frequency Searches Using the Fermi LAT
• Particle Acceleration and Non-Thermal Emission in Pulsar Outer Magnetospheric Gap
• The Next Geminga: Search for Radio and X-ray Pulsations from the Neutron Star Identified with 3EG J1835+5918
• Multiwavelength properties of a new Geminga-like pulsar: PSR J2021+4026

Cited by in corpus (13)

• Cooling neutron star in the Cassiopeia~A supernova remnant: Evidence for superfluidity in the core
• Thermal luminosities of cooling neutron stars
• PSR J0007+7303 in the CTA1 SNR: New Gamma-ray Results from Two Years of Fermi-LAT Observations
• Molecular environment, reverberation, and radiation from the pulsar wind nebula in CTA 1
• Stellar Binaries That Survive Supernovae
• Discovery of X-ray Pulsation from the Geminga-like Pulsar PSR J2021+4026
• Population synthesis of young isolated neutron stars: the effect of fallback disk accretion and magnetic field evolution
• Spectral characterization of the non-thermal X-ray emission of gamma-ray pulsars
• Gamma-ray emission from PSR J0007+7303 using 7 years of Fermi Large Area Telescope observations
• The $\gamma$-ray pulsar J0633+0632 in X-rays
• Discovery of X-ray pulsations from "next Geminga" - PSR J1836+5925
• Investigation of CTA 1 with Suzaku Observation
• AstroSat-CZTI as a hard X-ray Pulsar Monitor