RXTE timing analysis of the anomalous X-ray pulsar 1E 2259+586

Icdem, B.
Baykal, Altan
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 derivative after the 2002 glitch is not stable as it decreased by an order of magnitude, from -2.2 x 10(-2) to -1.278(3) x 10-3, in about 2.5 yr. Using a pulse-timing analysis, we discover two small frequency shifts with fractional changes Delta v/v= 3.08(32) x 10(-8) and Delta v/v=-1.39(11) x 10(-8). While the first of these shifts is not found to have a fractional frequency derivative change, the second has . We interpret these frequency changes as positive and negative microglitches, similar to those seen in radio pulsars.


RXTE and Swift Observations of SWIFT J0513.4-6547
Sahiner, S.; Serim, Muhammed Miraç; Baykal, Altan; İNAM, SITKI ÇAĞDAŞ (Oxford University Press (OUP), 2016-02-11)
We present timing and spectral analysis of Swift-XRT (X-ray Telescope) and RXTE-PCA (Rossi X-ray Timing Explorer-proportional Counter Array) observations of the transient Be/X-ray pulsar SWIFT J0513.4-6547 during its outburst in 2009 and its rebrightening in 2014. From 2009 observations, short-term spin-up rate of the source after the peak of the outburst is found to have about half of the value measured at the peak of the outburst by Coe et al. When the source is quiescent between 2009 and 2014, average sp...
RXTE-PCA observations of XMMU J054134.7-682550
İNAM, SITKI ÇAĞDAŞ; Townsend, L. J.; McBride, V. A.; Baykal, Altan; Coe, M. J.; Corbet, R. H. D. (Oxford University Press (OUP), 2009-05-21)
We analysed Rossi X-ray Timing Explorer Proportional Counter Array observations of a recent outburst of the X-ray pulsar XMMU J054134.7-682550. We calculated the pulse frequency history of the source. We found no sign of a binary companion. The source spins up when the X-ray flux is higher, with a correlation between the spin-up rate and X-ray flux, which may be interpreted as a sign of an accretion disc. On the other hand, the source was found to have an almost constant spin frequency when the X-ray flux i...
The steady spin-down rate of 4U 1907+09
Baykal, Altan; Alpar, MA; Zand, JI; Strohmayer, T (2001-11-11)
Using X-ray data from the Rossi X-ray Timing Explorer, we report the pulse timing results of the accretion-powered, high-mass X-ray binary pulsar 4U 1907 + 09, covering a time-span of almost two years. We measured three new pulse periods in addition to the previously measured four pulse periods. We are able to connect pulse arrival times in phase for more than a year. The source has been spinning down almost at a constant rate, with a spin-down rate of (nu) over dot = (- 3.54 +/- 0.02) x 10(-14) Hz s(-1) fo...
Investigation of quasi-periodic noise features in x-persei
Acuner, Zeynep; Baykal, Altan; Department of Physics (2014)
In this thesis, timing and spectral properties of the Be type X-ray binary XPersei based on Rossi X-Ray Timing Explorer (RXTE) have been presented. Results of the power spectral analysis of RTXE data show QPO features detected between ⇠ 0.1-0.4 Hz which are reported for the first time. Another significant property of X-Per’s power spectra is the time dependent excess that can be observed between 0.01-0.08 Hz throughout the observations. These power excesses are interpreted as an inherent feature of source’s...
X-ray timing properties of four anomalous x-ray pulsars: 4u 0142+61, 1e 2259+586, 1rxs j170849.0_400910, and 1e 1841_045
Çerri, Danjela; Baykal, Altan; İnam, Sıtkı Çağdaş; Department of Physics (2015)
In this thesis, the detailed X-ray timing characteristics of four Anomalous X-Ray Pulsars (AXPs); 4U 0142+61, 1E 2259+586, 1RXS J170849.0 -400910, and 1E 1841- 045 are presented for glitch free time intervals using data taken by Rossi X-Ray Timing Explorer (RXTE). The pulse arrival times of these AXPs are evaluated by phase coherent timing method. After the removal of the spin-down trend from pulse arrivals, remaining residuals are used for estimation of their noise strengths. Possible correlation of the no...
Citation Formats
B. Icdem, A. Baykal, and S. Ç. İNAM, “RXTE timing analysis of the anomalous X-ray pulsar 1E 2259+586,” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, pp. 3109–3114, 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41423.