Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.296..353c&link_type=abstract
In ESA, The 23rd ESLAB Symposium on Two Topics in X Ray Astronomy. Volume 1: X Ray Binaries p 353-357 (SEE N90-25711 19-89)
Astronomy and Astrophysics
Astronomy
Pulsars, Pulse Amplitude, Spectral Correlation, Stellar Luminosity, X Ray Binaries, Galaxies, Pulse Duration, Pulse Rate, Spectrum Analysis, Stellar Spectra, X Ray Spectra
Scientific paper
The correlations between X-ray luminosity and pulse shape and spectral shape in selected X-ray pulsars are presented to check proposed trends which were noted with changing luminosity between differents pulsars. Individual pulsars at different luminosity states are analyzed using archival data. In a sample of five different sources pulse profile changes are found in all sources. Only the low luminosity sources GX 301-2 and 4U 1538-52 show the expected change of complexity. The three other sources show indefinite results. Out of a sample of three different sources for which spectral analysis was performed, both low luminosity sources, GX 301-2 and Vela X-1 show the expected behavior: a steeper spectral cutoff in their higher luminosity state.
Collmar Werner
Gruber Duane E.
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