Extended observations of Vela X-1 by OSO-8

Technical Report · Sat Oct 01 04:00:00 EDT 1977

OSTI ID:6474677

Becker, R H; Rothschild, R E; Boldt, E A; Holt, S S; Pravdo, S H

The Goddard Space Flight Center 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 approximately 6.8 keV. When combined with other observations, our measurements show that the pulse period is not decreasing monotonically. The three eclipses observed all indicate a significant eclipse flux.

• Research Organization: National Aeronautics and Space Administration, Greenbelt, MD (USA). Goddard Space Flight Center
• OSTI ID: 6474677
• Report Number(s): N-78-17958; NASA-TM-78098
• Country of Publication: United States
• Language: English

Related Subjects

640103* -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BINARY STARS
COSMIC RADIO SOURCES
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
ECLIPSE
ORBITING SOLAR OBSERVATORIES
PHOTOMETRY
PULSARS
SATELLITES
SPECTRA
STARS
X-RAY SPECTRA