Long-term X-ray variability in GX 354-0

✍ Scribed by A.K.H. Kong; P.A. Charles; E. Kuulkers

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 506 KB
• Volume: 3
• Category: Article
• ISSN: 1384-1076
• DOI: 10.1016/s1384-1076(98)00017-7

✦ Synopsis

We report for the first time the detection of long-term X-ray variability in the bright bulge source GX 354-O (=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-O as a super-orbital effect. 0 1998 Elsevier Science B.SJ.