GX339-4: a new black hole candidate

THE large area survey instrument on HEAO 1 has observed that the galactic X-ray source GX339–4 (4U1658–48) varies on time scales from tens of milliseconds to hundreds of days. Its long term variability was known from measurements made by OSO 7 1 and by Uhuru 2 but this is the first observation of ap...

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Bibliographic Details
Published in:Nature (London) 1979-03, Vol.278 (5703), p.434-436
Main Authors: SAMIMI, J, SHARE, G. H, WOOD, K, YENTIS, D, MEEKINS, J, EVANS, W. D, SHULMAN, S, BYRAM, E. T, CHUBB, T. A, FRIEDMAN, H
Format: Article
Language:English
Subjects:
Humanities and Social Sciences
letter
multidisciplinary
Science
Science (multidisciplinary)
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Summary:THE large area survey instrument on HEAO 1 has observed that the galactic X-ray source GX339–4 (4U1658–48) varies on time scales from tens of milliseconds to hundreds of days. Its long term variability was known from measurements made by OSO 7 1 and by Uhuru 2 but this is the first observation of aperiodic variability on time scales of tens of milliseconds to a few seconds. We show here that the overall characteristics of GX339–4 place it in the same class of X-ray sources as Cyg X–1 (ref. 3 summarises Cyg X–1) and Cir X–1 2,4–6
ISSN:0028-0836
1476-4687
DOI:10.1038/278434a0