Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979natur.278..434s&link_type=abstract
Nature, vol. 278, Mar. 29, 1979, p. 434-436. NASA-supported research.
Astronomy and Astrophysics
Astronomy
59
Black Holes (Astronomy), X Ray Sources, Aperiodic Functions, Collimators, Heao 1, Oso-7
Scientific paper
HEAO-1 observations of aperiodic variability in the galactic X-ray source GX339-4 (4U 1658-48) on time scales of tens of milliseconds to a few seconds are reported. It is shown that the overall characteristics of GX339-4 place it in the same class of X-ray sources as Cyg X-1 and Cir X-1, which are candidates for black holes in binary systems. The detection of X-ray flares from GX339-4 is discussed, particularly a series of five sequential flares with separations of about 250 ms.
Byram Edward T.
Chubb Talbot. A.
Evans Dafydd W.
Friedman Harvey
Meekins J.
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