A Broad-Band X-Ray Telescope spectrum of the massive X-ray binary X Persei

Details A Broad-Band X-Ray Telescope spectrum of the massive X-ray binary X Persei A Broad-Band X-Ray Telescope spectrum of the massive X-ray binary X Persei

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...407..744s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 407, no. 2, p. 744-751.

Astronomy and Astrophysics

Astrophysics

22

Astronomical Spectroscopy, B Stars, X Ray Binaries, X Ray Telescopes, Emission Spectra, Light Curve, Spectral Line Width, Stellar Luminosity

Scientific paper

The Broad Band X-Ray Telescope, covering the 0.3-12 keV bandpass with moderate spectral resolution, observed the Be/X-ray binary X Per in 1990 December during the Astro-l mission on the Space Shuttle Columbia. The data obtained are the best to date to search for lines and edges. The data are well fitted by a power-law spectrum with a high-energy cutoff. A low value for the high-energy cutoff is found, implying a slightly weaker magnetic field strength for the X-ray pulsar. No iron line is present at about 6.5 keV with an equivalent width greater than 30-40 eV. The BBXRT observation corresponded to the 'off' state of X Per's recent 'phase change'.

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