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Long-term periodicities in the flux from low mass X-ray binaries


Dieters, S and O'Neill, P and Farrell, S and Sood, R, Long-term periodicities in the flux from low mass X-ray binaries, Advances in Space Research, 35, (6) pp. 1185-1191. ISSN 0273-1177 (2005) [Refereed Article]

DOI: doi:10.1016/j.asr.2005.03.065


Using data from the All Sky Monitor (ASM) on the Rossi X-ray Timing Explorer (RXTE), we have searched for long term periodicities in the X-ray flux of GX 1+4, Sco X-2 (GX 349+2), and GX 339-4. For GX 1+4, we also used data from BATSE and Galactic Centre scans performed by RXTE. We find no evidence for X-ray modulations at the suggested ∼304 d orbital period of GX 1+4. However, we find tentative evidence for a periodicity at 420-460 d. An upper limit of 15% peak-to-peak is set on any sinusoidal modulation in the 1.5-3.0 keV flux of Sco X-2 for periods in the 30-100 d range. For GX 339-4, we confirm the Low State modulation and report the detection of significant low-frequency modulations in both the High State and Very High State. We fail to detect this modulation in the Off State. We show that if the reported orbital period of GX 339-4 lies in the range 0.5-1.7 d, then it is not present in the RXTE ASM light curve. © 2005 COSPAR. Published by Elsevier Ltd. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Dieters, S (Dr Stefan Dieters)
ID Code:35576
Year Published:2005
Web of Science® Times Cited:2
Deposited By:Physics
Deposited On:2005-08-01
Last Modified:2006-06-28

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