Computer Science – Numerical Analysis
Scientific paper
Oct 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...434..288m&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 434, no. 1, p. 288-291
Computer Science
Numerical Analysis
38
Binary Stars, Gamma Rays, Pulsars, Pulse Amplitude, Supernova Remnants, X Ray Spectra, X Ray Stars, Collimators, Gamma Ray Observatory, Numerical Analysis, Satellite-Borne Instruments, Scaling
Scientific paper
Oriented Scintillation Spectrometer Experiment (OSSE) observed the 150 ms X-ray pulsar PSR B1509-58 m the supernova remnant MSH 15-52 for 4 weeks in 1992. The pulsed spectrum from 50 keV to 5 MeV is well represented by a single-power-law photon spectrum of the form (3.14 +/- 0.16) x 10-6 x (E/118.5 keV)-1.68 +/- -0.09 photons cm-2s-1keV-1. This is significantly harder than the Crab pulsar spectrum in this energy range. The Ginga soft X-ray spectrum (2-60 keV) reported by Kawai et al. is significantly harder than the observed OSSE spectrum and predicts a flux 2 times higher than we observe in the approximately 55-170 keV energy band. This requires a break to a steeper spectrum somewhere in the intermediate energy range (approximately 20-80 keV). The spectrum must soften again at higher energies or the pulsar would have easily been detected by EGRET, COS B, and SAS 2.
Grabelsky David Andrew
Grove Eric J.
Johnson Neil W.
Jung Gregory V.
Kinzer Robert L.
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