Pulsar Timing with the Parkes Radio Telescope for the <i>Fermi</i> Mission

Weltevrede, P.; Johnston, S.; Manchester, R. N.; Bhat, N. D. R.; Burgay, M.; Champion, D. J.; Hobbs, G.; Kızıltan, Bülent; Keith, Michael; Possenti, A.; Reynolds, J. E.; Watters, K.

doi:10.1071/as09054

Cited by 78 publications

(73 citation statements)

References 52 publications

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“…As part of the space-and ground-based pulsar timing campaign supporting Fermi (Smith et al 2008), the pulsar PSR J1357−6429 is being observed at the 64-m Parkes radio telescope (Weltevrede et al 2010b). A total of 74 observations spanning MJDs 54 220 to 55 575 were made in a band centered at 1369 MHz.…”

Section: Radio Timing Observationsmentioning

confidence: 99%

“…An H-test value of 89.6 is obtained above 100 MeV, corresponding to a pulsed detection significance of ∼8σ (de Jager & Büsching 2010). Figure 1 shows the 25 bin gamma-ray light curve (top panel) as well as the 1.4 GHz radio profile (bottom panel) derived from observations with the Parkes radio telescope (Weltevrede et al 2010b). The gamma-ray peak is offset from the radio pulse by 0.37 ± 0.03 ± 0.01 according to a Lorentzian fit with a full width at half maximum (FWHM) of ∼0.25.…”

Section: Gamma-and X-ray Light Curvesmentioning

confidence: 99%

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Discovery of gamma- and X-ray pulsations from the young and energetic PSR J1357−6429 withFermiandXMM-Newton

Lemoine‐Goumard

Zavlin

Grondin

et al. 2011

A&A

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Context. Since the launch of the Fermi satellite, the number of known gamma-ray pulsars has increased tenfold. Most gamma-ray detected pulsars are young and energetic, and many are associated with TeV sources. PSR J1357−6429 is a high spin-down power pulsar (Ė = 3.1 × 10 36 erg s −1 ), discovered during the Parkes multibeam survey of the Galactic plane, with significant timing noise typical of very young pulsars. In the very-high-energy domain (E > 100 GeV), H.E.S.S. has reported the detection of the extended source HESS J1356−645 (intrinsic Gaussian width of 12 ) whose centroid lies 7 from PSR J1357−6429. Aims. We search for gamma-and X-ray pulsations from this pulsar, characterize the neutron star emission and explore the environment of PSR J1357−6429. Methods. Using a rotational ephemeris obtained with 74 observations made with the Parkes telescope at 1.4 GHz, we phase-fold more than two years of gamma-ray data acquired by the Large Area Telescope on-board Fermi as well as those collected with XMM-Newton, and perform gamma-ray spectral modeling. Results. Significant gamma-and X-ray pulsations are detected from PSR J1357−6429. The light curve in both bands shows one broad peak. Gamma-ray spectral analysis of the pulsed emission suggests that it is well described by a simple power-law of index 1.5 ± 0.3 stat ± 0.3 syst with an exponential cut-off at 0.8 ± 0.3 stat ± 0.3 syst GeV and an integral photon flux above 100 MeV of (6.5 ± 1.6 stat ± 2.3 syst ) × 10 −8 cm −2 s −1 . The X-ray spectra obtained from the new data provide results consistent with previous work. Upper limits on the gamma-ray emission from its potential pulsar wind nebula (PWN) are also reported. Conclusions. Assuming a distance of 2.4 kpc, the Fermi LAT energy flux yields a gamma-ray luminosity for PSR J1357−6429 of L γ = (2.13 ± 0.25 stat ± 0.83 syst ) × 10 34 erg s −1 , consistent with an L γ ∝ √Ė relationship. The Fermi non-detection of the pulsar wind nebula associated with HESS J1356−645 provides new constraints on the electron population responsible for the extended TeV emission.

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Section: Radio Timing Observationsmentioning

confidence: 99%

Section: Gamma-and X-ray Light Curvesmentioning

confidence: 99%

Discovery of gamma- and X-ray pulsations from the young and energetic PSR J1357−6429 withFermiandXMM-Newton

Lemoine‐Goumard

Zavlin

Grondin

et al. 2011

A&A

Self Cite

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“…DATA ANALYSIS AND RESULTS 3.1. Radio Ephemeris We used the pulsar ephemeris obtained with the Parkes Observatory, which is a part of the timing program for Fermi (Weltevrede et al 2010). A total of 88 times of pulse arrivals (TOAs) between MJD 54220 and MJD 56512 were used to generate the short time-baseline ephemeris.…”

Section: Observations and Data Reductionmentioning

confidence: 99%

Chandra Phase-resolved Spectroscopy of the High Magnetic Field Pulsar B1509−58

Takata

et al. 2017

ApJ

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We report on a timing and spectral analysis of the young, high magnetic field rotation-powered pulsar (RPP) B1509−58 using Chandra continuous-clocking mode observation. The pulsar's X-ray light curve can be fit by the two Gaussian components and the pulsed fraction shows moderate energy dependence over the Chandra band. The pulsed X-ray spectrum is well described by a power law with a photon index 1.16(4), which is harder than the values measured with RXTE/PCA and NuSTAR. This result supports the log-parabolic model for the broadband X-ray spectrum. With the unprecedented angular resolution of Chandra, we clearly identified off-pulse X-ray emission from the pulsar, and its spectrum is best fit by a power law plus blackbody model. The latter component has a temperature of ∼0.14 keV with a bolometric luminosity comparable to the luminosities of other young and high magnetic field RPPs, and it lies between the temperature of magnetars and typical RPPs. In addition, we found that the nonthermal X-ray emission of PSR B1509−58 is significantly softer in the off-pulse phase than in the pulsed phase, with the photon index varying between 1.0 and 1.8 and anticorrelated with the flux. This is similar to the behavior of three other young pulsars. We interpreted it as different contributions of pair-creation processes at different altitudes from the neutron star surface according to the outer-gap model.

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“…Table 1 lists the radio observatories and the validity date ranges for the ephemerides used here. The radio data used in this work came from the Lovell telescope at Jodrell Bank Observatory (JBO, Hobbs et al 2004b); from the Parkes observatory (PKS, Weltevrede et al 2010); and from the Nançay radio telescope (NRT, Cognard et al 2011). The ephemerides completely cover the gamma-ray data sample, except for the millisecond pulsar (MSP) PSR J1732−5049.…”

Section: Gamma-ray Datamentioning

confidence: 99%

Six faint gamma-ray pulsars seen with theFermiLarge Area Telescope

Hou

Smith

Guillemot

et al. 2014

A&A

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Context. GeV gamma-ray pulsations from over 140 pulsars have been characterized using the Fermi Large Area Telescope, enabling improved understanding of the emission regions within the neutron star magnetospheres, and the contributions of pulsars to high energy electrons and diffuse gamma rays in the Milky Way. The first gamma-ray pulsars to be detected were the most intense and/or those with narrow pulses. Aims. As the Fermi mission progresses, progressively fainter objects can be studied. In addition to more distant pulsars (thus probing a larger volume of the Galaxy), or ones in high background regions (thus improving the sampling uniformity across the Galactic plane), we detect pulsars with broader pulses or lower luminosity. Adding pulsars to our catalog with inclination angles that are rare in the observed sample, and/or with lower spindown power, will reduce the bias in the currently known gamma-ray pulsar population. Methods. We use rotation ephemerides derived from radio observations to phase-fold gamma rays recorded by the Fermi Large Area Telescope, to then determine the pulse profile properties. Spectral analysis provides the luminosities and, when the signal-to-noise ratio allows, the cutoff energies. We constrain the pulsar distances by different means in order to minimize the luminosity uncertainties.Results. We present six new gamma-ray pulsars with an eclectic mix of properties. Three are young, and three are recycled. They include the farthest, the lowest power, two of the highest duty-cycle pulsars seen, and only the fourth young gamma-ray pulsar with a radio interpulse. We discuss the biases existing in the current gamma-ray pulsar catalog, and steps to be taken to mitigate the bias.

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Pulsar Timing with the Parkes Radio Telescope for the Fermi Mission

Cited by 78 publications

References 52 publications

Discovery of gamma- and X-ray pulsations from the young and energetic PSR J1357−6429 withFermiandXMM-Newton

Discovery of gamma- and X-ray pulsations from the young and energetic PSR J1357−6429 withFermiandXMM-Newton

Chandra Phase-resolved Spectroscopy of the High Magnetic Field Pulsar B1509−58

Six faint gamma-ray pulsars seen with theFermiLarge Area Telescope

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