Published August 1985
| Version v1
Report
High-resolution spectroscopic observation of Vela X-1 in the hard X-ray energy range
- 1. CEA, Saclay, France
Description
The 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
Additional details
Publishing Information
- Imprint Title
- Ninteenth International Cosmic Ray Conference. OG sessions, volume 1
- Journal Page Range
- vp.
- Report number
- NASA-CP--2376-VOL-1
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 17080543
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- BINARY STARS; COSMIC X-RAY SOURCES; ENERGY SPECTRA; GAMMA SPECTROMETERS; HARD X RADIATION; NEUTRON STARS; PULSARS; SPECTROSCOPY
- Descriptors DEC
- COSMIC RADIO SOURCES; COSMIC RAY SOURCES; ELECTROMAGNETIC RADIATION; IONIZING RADIATIONS; MEASURING INSTRUMENTS; RADIATIONS; SPECTRA; SPECTROMETERS; STARS; X RADIATION