Osse upper limits to pulsar gamma-ray emission

P. C. Schroeder*, M. P. Ulmer, S. M. Matz, D. A. Grabelsky, W. R. Purcell, J. E. Grove, W. N. Johnson, R. L. Kinzer, J. D. Kurfess, M. S. Strickman, G. V. Jung

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

We present upper limits from CGRO Oriented Scintillation Spectrometer Experiment (OSSE) observations of pulsars and a summary of pulsar observations made with the Compton Gamma Ray Observatory (CGRO). We also report an upper limit to phase-averaged emission for the globular cluster 47 Tue which is thought to contain many millisecond pulsars. The 2 σ upper limit is 3 × 10-5 photons cm-2 s-1 keV-1 in the 50-150 keV energy range. The best predictor of a pulsar having a detectable gamma-ray emission appears to be the X-ray luminosities observed by the Röntgen Satellite (ROSAT) (∼0.1-2.4 keV) or the Einstein satellite (∼0.1-4.0 keV). We compare the gamma-ray data to models related to the inferred magnetic field, the spin-down rate, and/or the frequency. Apparent correlations indicated by the pulsars detected by OSSE and the CGRO Energetic Gamma-Ray Experiment Telescope (EGRET) have counterexamples in all cases.

Original languageEnglish (US)
Pages (from-to)784-790
Number of pages7
JournalAstrophysical Journal
Volume450
Issue number2
DOIs
StatePublished - Sep 10 1995

Keywords

  • Gamma rays: observations
  • Pulsars: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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