Long-term X-ray variability in GX 354-0
1998; Elsevier BV; Volume: 3; Issue: 5 Linguagem: Inglês
10.1016/s1384-1076(98)00017-7
ISSN1384-1092
AutoresA. K. H. Kong, P. A. Charles, E. Kuulkers,
Tópico(s)Galaxies: Formation, Evolution, Phenomena
ResumoWe report for the first time the detection of long-term X-ray variability in the bright bulge source GX 354-0 (=4U 1728-34) observed with the All Sky Monitor (ASM) on board the Rossi X-Ray Timing Explorer (RXTE). The 2-year RXTE ASM database reveals significant power at ∼ 72 days. Similar behaviour was seen in the 6-year Ariel 5 ASM database, but at a period of ∼ 63 days. The timescales and light curves resemble the ∼ 78 days modulation seen in Cyg X-2 and we therefore interpret this modulation in GX 354-0 as a super-orbital effect.
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