A study of the spectra and pulse profiles of Centaurus X-3 from Hakucho

Details A study of the spectra and pulse profiles of Centaurus X-3 from Hakucho A study of the spectra and pulse profiles of Centaurus X-3 from Hakucho

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...282..709l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 282, July 15, 1984, p. 709-712. Sponsorship: Natural Sciences and Engineeri

Astronomy and Astrophysics

Astrophysics

3

Eclipsing Binary Stars, Pulsars, Stellar Spectra, X Ray Sources, Japanese Spacecraft, Light Curve, Photons, Spectrum Analysis

Scientific paper

The binary X-ray pulsar Cen X-3 was observed by the Japanese X-ray satellite Hakucho during March 16-30, 1982. The data from the proportional counter FMC 2 have been analyzed to produce the high state spectrum in the energy range 2-20 keV. This cannot be fitted with a simple model spectrum. A comparison of the spectra taken at pulse peak and pulse minimum reveals that the X-rays associated with the former are harder. Finally, the pulse profiles constructed for four energy bins also reveal that the radiation is more modulated at high energy. At lower energy, a broad secondary peak is observed, which differs in relative intensity from previous results.

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