University of Leicester
Browse

Swift/X-ray Telescope monitoring of the candidate supergiant fast X-ray transient IGR J16418-4532

Download (709.41 kB)
journal contribution
posted on 2012-10-24, 08:55 authored by P. Romano, V. Mangano, S. Vercellone, L. Ducci, P. Esposito, P. A. Evans, J. A. Kennea, D. N. Burrows, N. Gehrels
We report on the Swift monitoring of the candidate supergiant fast X-ray transient (SFXT) IGR J16418−4532, for which both orbital and spin periods are known (∼3.7 d and ∼1250 s, respectively). Our observations, for a total of ∼43 ks, span over three orbital periods and represent the most intense and complete sampling of the light curve of this source with a sensitive X-ray instrument. With this unique set of observations, we can address the nature of this transient. By applying the clumpy wind model for blue supergiants to the observed X-ray light curve, and assuming a circular orbit, the X-ray emission from this source can be explained in terms of the accretion from a spherically symmetric clumpy wind, composed of clumps with different masses, ranging from ∼5 × 10[superscript: 16] to 10[superscript: 21] g. Our data suggest, based on the X-ray behaviour, that this is an intermediate SFXT.

History

Citation

Monthly Notices of the Royal Astronomical Society, 2012, 419 (3), pp. 2695-2702

Version

  • VoR (Version of Record)

Published in

Monthly Notices of the Royal Astronomical Society

Publisher

Oxford University Press (OUP)

issn

0035-8711

eissn

1365-2966

Copyright date

2011

Available date

2012-10-24

Publisher version

http://mnras.oxfordjournals.org/content/419/3/2695

Language

en

Usage metrics

    University of Leicester Publications

    Categories

    No categories selected

    Keywords

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC