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

P. Romano, V. Mangano, L. Ducci, P. Esposito, P. A. Evans, S. Vercellone, J. A. Kennea, D. N. Burrows, N. Gehrels

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

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 (~3.7d and ~1250s, respectively). Our observations, for a total of ~43ks, 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 16 to 10 21g. Our data suggest, based on the X-ray behaviour, that this is an intermediate SFXT.

Original languageEnglish (US)
Pages (from-to)2695-2702
Number of pages8
JournalMonthly Notices of the Royal Astronomical Society
Volume419
Issue number3
DOIs
StatePublished - Jan 2012

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'Swift/X-ray Telescope monitoring of the candidate supergiant fast X-ray transient IGR J16418-4532'. Together they form a unique fingerprint.

Cite this