X-ray and Radio Timing of the Pulsar in 3C 58

Details X-ray and Radio Timing of the Pulsar in 3C 58 X-ray and Radio Timing of the Pulsar in 3C 58

2009-01-14

arxiv.org/abs/0901.2119v2

Astrophys.J.706:1163-1173,2009

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

19 pages, 12 figures. Published in the Astrophysical Journal. Includes additional data analysis and two new figures

Scientific paper

10.1088/0004-637X/706/2/1163

We present timing data spanning 6.4 yr for the young and energetic PSR J0205+6449, in the supernova remnant 3C 58. Data were obtained with the Rossi X-ray Timing Explorer, the Jodrell Bank Observatory and the Green Bank Telescope. We present phase-coherent timing analyses showing timing noise and two spin-up glitches with fractional frequency increases of ~3.4E-7 near MJD 52555, and ~3.8E-6 between MJDs 52777 and 53062. These glitches are unusually large if the pulsar was created in the historical supernova in 1181 as has been suggested. For the X-ray timing we developed a new unbinned maximum-likelihood method for determining pulse arrival times which performs significantly better than the traditional binned techniques. In addition, we present an X-ray pulse profile analysis of four years of RXTE data showing that the pulsar is detected up to ~40 keV. We also present the first measurement of the phase offset between the radio and X-ray pulse for this source, showing that the radio pulse leads the X-ray pulse by phi=0.10+/-0.01 in phase. We compile all known measurements of the phase offsets between radio and X-ray and radio and gamma-ray pulses for X-ray and gamma-ray pulsars. We show that there is no relationship between pulse period and phase offset, supported by our measurement of the phase offset for PSR J0205+6449.

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