Pulse Profiles of Swift J1626.6+5156

Baykal, Altan
Icdem, B.
In this paper, we analyzed pulse profiles of Swift J1626.6+5156 using the lightcurves from RXTE‐PCA observations between MJD 53724 (just after the outburst) and MJD 55113 and a Chandra‐ACIS dataset on MJD 54897 with a 20 ks exposure. We found that pulse profiles show morphological variations and pulsations do not cease even ∼1200 days after the outburst. Despite these variations, we did not find any significant variation in the pulsed fraction with decreasing X‐ray flux.


Thickness analysis of thin films by energy dispersive x-ray spectroscopy
Canlı, Sedat; Turan, Raşit; Akata Kurç, Burcu; Department of Micro and Nanotechnology (2010)
EDS is a tool for quantitative and qualitative analysis of the materials. In electron microscopy, the energy of the electrons determines the depth of the region where the X-rays come from. By varying the energy of the electrons, the depth of the region where the X-rays come from can be changed. If a thin film is used as a specimen, different quantitative ratios of the elements for different electron energies can be obtained. Unique thickness of a specific film on a specific substrate gives unique energy-rat...
Pulse timing studies of X-ray binaries: GX1+4,SWIFT J0513.4-6547, X Persei and SXP 1062
Serim, Muhammed Miraç; Baykal, Altan; İnam, Sıtkı Çağdaş; Department of Physics (2019)
This thesis focuses on X-ray timing properties of four different X-ray binary systems, based on archival data of the X-ray missions RXTE, Swift, XMM-Newton, Chandra and Integral. One of the selected sources is a LMXB system GX 1+4 while remaining sources are BeXB systems: SWIFT J0513.4-6547, X Persei and SXP 1062. For GX 1+4, the timing analysis of RXTE-PCA observations between 2001 March 3 and 2003 January 31 are presented. The timing solutions of two different time intervals are constructed. Futhermore, w...
Differences between the two anomalous X-ray pulsars: variations in the spin-down rate of 1E 1048.1-5937 and an extended interval of quiet spin-down in 1E 2259+586
Baykal, Altan; Swank, J; Alpar, MA; Stark, MJ (2000-11-21)
We analysed the Rossi X-ray Timing Explorer (RXTE) archival data of 1E 1048.1-5937 covering a time-span of more than one year. The spin-down rate of this source decreases by similar to 30 per cent during the observation. We could not resolve the X-ray flux variations because of contamination by eta Carinae. We find that the level of pulse frequency fluctuations of 1E 1048.1-5937 is consistent with typical noise levels of accretion-powered pulsars. Recent RXTE observations of 1E 2259+586 have shown a constan...
Pulse phase resolved x-ray spectroscopy of four accretion powered millisecond pulsars
Çolak, Sıdıka Merve; Baykal, Altan; Department of Physics (2014)
In this thesis, pulse phase resolved X-ray spectroscopy of four accretion powered millisecond pulsars which are IGR J00291+5934 , IGR J17498-2921 , XTE J0929-314 and XTE J1807-294 will be presented. Phase dependent changes during their outbursts will be checked for possible correlations of spectral parameters such as photon index and blackbody temperature with rotation phase using archive of Rossi X-ray Timing Explorer (RXTE) observations. In the analysis of IGR J17498-2921 in 2011 outburst , positive corre...
RXTE timing analysis of the anomalous X-ray pulsar 1E 2259+586
Icdem, B.; Baykal, Altan; İNAM, SITKI ÇAĞDAŞ (2012-02-01)
We present a pulse-timing analysis of Rossi X-ray Timing Explorer (RXTE) observations of the anomalous X-ray pulsar 1E 2259+586 from its 2002 outburst to 2010 October. We have the following objectives: to extend the work on the recovery stage after the 2002 glitch; to investigate the variations caused by the second glitch that occurred in 2007; to look for other unusual events, if any, that arise in the regular spin-down trend of the source. We find that the fractional change in the spin frequency derivativ...
Citation Formats
A. Baykal and B. Icdem, “Pulse Profiles of Swift J1626.6+5156,” 2010, vol. 1379, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41416.