Long-term X-ray variability in GX 354-0
Abstract
We 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.
- Publication:
-
New Astronomy
- Pub Date:
- July 1998
- DOI:
- 10.1016/S1384-1076(98)00017-7
- arXiv:
- arXiv:astro-ph/9805077
- Bibcode:
- 1998NewA....3..301K
- Keywords:
-
- BINARIES: CLOSE;
- STARS: INDIVIDUAL: GX 354-0;
- 4U 1728-34;
- STARS: NEUTRON;
- X-RAYS: STARS;
- Astrophysics
- E-Print:
- 9 pages, 3 figures, accepted for publication in New Astronomy