300 GeV gamma rays from Vela X-1

The high-mass X-ray binary Vela X-1 has been observed using the Narrabri 300 GeV gamma-ray telescope. The results show evidence for pulsed very high energy (VHE) gamma-ray emission, with a conservative overall Rayleigh chance probability of 0.00011. The long-term period derivative during our observa...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	The Astrophysical journal 1989-11, Vol.346 (2), p.967-970
Hauptverfasser:	CARRAMINAMA, A, CHADWICK, P. M, DIPPER, N. A, LINCOLN, E. W, MANNINGS, V. G, MCCOMB, T. J. L, ORFORD, K. J, RAYNER, S. M, TURVER, K. E, WILLIAMS, D. G
Format:	Artikel
Sprache:	eng
Schlagworte:	640102 - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources Astronomy BINARY STARS CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS COSMIC RADIO SOURCES COSMIC RAY SOURCES COSMIC X-RAY SOURCES Earth, ocean, space ELECTROMAGNETIC RADIATION EMISSION SPECTRA Exact sciences and technology GAMMA RADIATION IONIZING RADIATIONS LUMINOSITY MAGNETIC FIELDS MASS OPTICAL PROPERTIES PHYSICAL PROPERTIES PULSARS PULSES RADIATIONS SPECTRA STAR ACCRETION STAR EVOLUTION STARS Stellar systems. Galactic and extragalactic objects and systems. The universe Unidentified sources and radiation outside the solar system X-ray sources x-ray bursts
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	The high-mass X-ray binary Vela X-1 has been observed using the Narrabri 300 GeV gamma-ray telescope. The results show evidence for pulsed very high energy (VHE) gamma-ray emission, with a conservative overall Rayleigh chance probability of 0.00011. The long-term period derivative during our observations of 1986-1988 was negative, indicating a spin-up similar to that noted between 1975 and 1979. The time-averaged luminosity in VHE gamma rays is estimated to be about 3.6 x 10 to the 34th ergs/s. 20 refs.
ISSN:	0004-637X 1538-4357
DOI:	10.1086/168077