Long-Term X-ray Variability in GX 354-0
Astrophysics
2009-10-30 v1
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.
Cite
@article{arxiv.astro-ph/9805077,
title = {Long-Term X-ray Variability in GX 354-0},
author = {A. K. H. Kong and P. A. Charles and E. Kuulkers},
journal= {arXiv preprint arXiv:astro-ph/9805077},
year = {2009}
}
Comments
9 pages, 3 figures, accepted for publication in New Astronomy