Timing and X-ray spectral features of Swift J1626.6-5156

Creative Commons License

Icdem B., İNAM S. Ç., BAYKAL A.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol.415, no.2, pp.1523-1526, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 415 Issue: 2
  • Publication Date: 2011
  • Doi Number: 10.1111/j.1365-2966.2011.18796.x
  • Journal Name: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1523-1526
  • Keywords: accretion, accretion discs, stars: neutron, pulsars: individual: Swift J1626.6-5156, X-rays: binaries, MAGNETIZED NEUTRON-STARS, PULSAR ATMOSPHERES, ACCRETING PULSARS, TORQUE, MODELS, PERIOD
  • Middle East Technical University Affiliated: Yes

Abstract

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 similar to 15 kpc and similar to 9 x 10(11) G, respectively. From the spectral analysis, we find that the power-law index increases and hydrogen column density decreases with a decreasing flux.