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High-resolution spectroscopic observation of Vela X-1 in the hard X-ray energy rangeThe first high resolution (1.2 keV FWHM hard X-ray equal to or greater than 20 keV) observation of Vela X-1 is reported. Data were accumulated during a 5 hour balloon flight launched on December 5, 1984. A summed epoch analysis yields a light curve and period (283 sec) consistent with previous measurements. Significant pulsations were present to an energy of 60 keV. No statistically significant features were observed in the energy spectrum and the spectrum is well fit (x sup 2 = 17.8 for 16 d.o.f.) by a simple exponential spectrum with an E folding length of 10.8 + or - 1.0 keV.
Document ID
19850025623
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Tueller, J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Cline, T. L. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Teegarden, B. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Durouchoux, P. (CEA Saclay, France)
Prantzos, N. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 12, 2013
Publication Date
August 1, 1985
Publication Information
Publication: 19th Intern. Cosmic Ray Conf - Vol. 1
Subject Category
Space Radiation
Report/Patent Number
OG-2.2-10
Report Number: OG-2.2-10
Accession Number
85N33936
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19850025589Collected WorksNinteenth International Cosmic Ray Conference. OG Sessions, Volume 119850025589Collected WorksNinteenth International Cosmic Ray Conference. OG Sessions, Volume 1
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