X-ray observations of the Vela pulsar: statistics and spectrum

Technical Report · Sat May 01 04:00:00 EDT 1976

OSTI ID:7309431

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

The Vela pulsar was observed in the range 2 to 60 keV by the GSFC proportional counter experiment onboard OSO-8 with temporal resolution sufficient to make possible a sensitive search for pulsed x rays at the radio pulsar period. A statistical analysis yielded 8 per cent as the 3 sigma upper limit on the pulsed fraction. The energy spectrum is fit well by a structureless power law with number index 2.21 +- 0.2 and absorption by a hydrogen column density of N/sub H/ = (2.9 +-0.2) x 10/sup 22//cm/sup 2/. (auth)

• Research Organization: National Aeronautics and Space Administration, Greenbelt, MD (USA). Goddard Space Flight Center
• OSTI ID: 7309431
• Report Number(s): N-76-24097; NASA-TM-X-71113; X-611-76-98
• 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
COSMIC GASES
COSMIC RADIO SOURCES
CRYOGENIC FLUIDS
DENSITY
ELEMENTS
ENERGY RANGE
ENERGY SPECTRA
FLUIDS
GASES
HYDROGEN
INTERGALACTIC SPACE
INTERSTELLAR SPACE
KEV RANGE
KEV RANGE 01-10
KEV RANGE 10-100
NONMETALS
PHYSICAL PROPERTIES
PULSARS
SPACE
SPECTRA
SUPERNOVA REMNANTS
X-RAY SPECTRA