Gamma-ray and radio observations of PSR B1509-58

M. P. Ulmer*, S. M. Matz, R. B. Wilson, M. J. Finger, K. S. Hagedon, D. A. Grabelsky, J. E. Grove, W. N. Johnson, R. L. Kinzer, J. D. Kurfess, W. R. Purcell, M. S. Strickman, V. M. Kaspi, S. Johnston, R. N. Manchester, A. G. Lyne, N. D'Amico

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

We report concurrent radio and gamma-ray observations of PSR B1509-58 carried out by the Parkes Radio Telescope and by the Burst and Transient Source Experiment (BATSE) and the Oriented Scintillation Spectrometer Experiment (OSSE) on the Compton Gamma-Ray Observatory (CGRO). Gamma-ray light curves fitted at several energies between ∼20 and 500 keV yield a phase offset with respect to the radio pulse that is independent of energy, with an average value 0.32±0.02. Although this value is larger by 0.07 than that reported by Kawai et al., the difference is not statistically significant (only ∼2 σ) when account is taken of the uncertainty associated with their result. We briefly discuss the possibility that the energy independence of the gamma-ray pulse phase is a signature of nonthermal radiation in the X-ray/gamma-ray range and the suggestion of a dependence of pulsar radio-gamma-ray phase offset on pulse period.

Original languageEnglish (US)
Pages (from-to)738-741
Number of pages4
JournalAstrophysical Journal
Volume417
Issue number2
DOIs
StatePublished - Nov 10 1993

Keywords

  • Gamma rays: observations
  • Pulsars: individual (PSR B1509-58)
  • Radio continuum: stars

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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