Extended observations of VELA X-1 by OSO 8

Details Extended observations of VELA X-1 by OSO 8 Extended observations of VELA X-1 by OSO 8

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...221..912b&link_type=abstract

Astrophysical Journal, Part 1, vol. 221, May 1, 1978, p. 912-916.

Astronomy and Astrophysics

Astronomy

59

Eclipsing Binary Stars, Oso-8, Pulsars, Spaceborne Astronomy, Stellar Spectrophotometry, X Ray Spectra, Absorption Spectra, Shock Waves, Stellar Spectra, Stellar Winds

Scientific paper

The Goddard Space Flight Center (GSFC) Cosmic X-Ray experiment aboard OSO 8 viewed the X-ray binary pulsar, Vela X-1, on three occasions from late 1975 through late 1976. The X-ray spectrum is well-represented by a power law modified by photoelectric absorption, a high-energy cutoff, and a line feature at about 6.8 keV. When combined with other observations, the reported measurements show that the pulse period is not decreasing monotonically. The three eclipses observed all indicate a significant eclipse flux.

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