Timing and X-ray Spectral Features of Swift J1626.6-5156

TL;DR

This study analyzes the timing and spectral features of Swift J1626.6-5156 using RXTE and Chandra data, revealing correlations between spin-up rate, flux, and spectral parameters, and estimating the source's distance and magnetic field.

Contribution

It provides new insights into the timing behavior and spectral evolution of Swift J1626.6-5156, including estimates of its distance and magnetic field based on combined observations.

Findings

Spin-up rate correlates with X-ray flux.

Power law index increases as flux decreases.

Hydrogen column density decreases with flux.

Abstract

In this paper, we extend timing analysis of Baykal et al. (2010) of \src 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 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 $\sim 15$kpc and $\sim 9\times 10^{11}$Gauss respectively. From the spectral analysis, we found that power law index increases and Hydrogen column density decreases with decreasing flux.