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Title: Timing and spectral studies of the Transient X-Ray Pulsar EXO 053109-6609.2 with ASCA and BeppoSAX
Authors: Paul, Biswajit
Jaaffrey, S.N.A.
Naik, S.
Agrawal, P.C.
Issue Date: Feb-2004
Publisher: IOP Publishing Ltd.
Citation: Astronomy and Astrophysics, 2004, Vol. 602, p913-917
Abstract: We report timing and spectral properties of the transient Be X-ray pulsar EXO 053109-6609.2, which was studied using observations made with the ASCA and BeppoSAX observatories. Although there must have been at least one spin-down episode of the pulsar since its discovery, the new pulse-period measurements show a monotonic spin-up trend since 1996. The pulse profile is found to have marginal energy dependence. There is also evidence for strong luminosity dependence of the pulse profile, which has a single-peaked profile at low luminosity that changes to a double-peaked profile at high luminosity. This suggests a change in the accretion pattern at certain luminosity levels. The X-ray spectrum is found to consist of a simple power law with a photon index in the range of 0.4-0.8. At high intensity levels the spectrum also shows the presence of a weak iron emission line.
Description: Restricted Access. An open-access version is available at (one of the alternative locations)
ISSN: 0004-637X
1538-4357 (Online)
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Copyright: 2004 The American Astronomical Society
Appears in Collections:Research Papers (A&A)

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