Journal Article

Timing and X-ray spectral features of <i>Swift</i> J1626.6−5156

Burçin İçdem, Sıtkı Çağdaş İnam and Altan Baykal

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 415, issue 2, pages 1523-1526
Published in print August 2011 | ISSN: 0035-8711
Published online July 2011 | e-ISSN: 1365-2966 | DOI:
Timing and X-ray spectral features of Swift J1626.6−5156

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In this paper, we extend the timing analysis by Baykal et al. of Swift J1626.6−5156 using RXTE–PCA observations between MJD 53724 and MJD 55113 together with a Chandra–ACIS observation on MJD 54897 with a 20-ks exposure. We also present the X-ray spectral analysis of these RXTE and Chandra observations. We find that the spin-up rate of the source is correlated with the X-ray flux. Using this correlation, we estimate the distance and surface magnetic field of the source as ∼15 kpc and ∼9 × 1011 G, respectively. From the spectral analysis, we find that the power-law index increases and hydrogen column density decreases with a decreasing flux.

Keywords: accretion, accretion discs; stars: neutron; pulsars: individual: Swift J1626.6−5156; X-rays: binaries

Journal Article.  2658 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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