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.


Spin-down rate of 1E 2259+586 from RXTE observation
Baykal, Altan; Strohmayer, T; Stark, MJ (1998-08-01)
We present new X-ray observations of the X-ray pulsar 1E 2259+586, obtained during March 1997, with the Rossi X-Ray Timing Explorer (RXTE). We have measured the pulse frequency derivative (nu) over dot = (-1.08 +/- 0.04) x 10(-14) Hz s(-1) from pulse arrival times obtained in a sequence of 5 observations spread over one month. This (nu) over dot is consistent with the long term spin-down trend. We also found that the observed X-ray luminosity is consistent with that measured at quiescent X-ray flux levels b...
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...
RXTE and Swift observations of SWIFT J1729.9-3437
Sahiner, S.; İNAM, SITKI ÇAĞDAŞ; Serim, Muhammed Miraç; Baykal, Altan (2013-10-01)
We analyse Rossi X-ray Timing Explorer (RXTE) and Swift observations of SWIFT J1729.9-3437 after its outburst from 2010 July 20 to 2010 August 12. We calculate a spin frequency and spin frequency derivative of 1.8734(8) x 10(-3) Hz and 6.42(6) x 10(-12) Hz s(-1), respectively from the quadratic fit of the pulse arrival times. The quadratic fit residuals fit well to a circular orbital model with a period of 15.3(2) d and a mass function of about 1.3 M-circle dot, but they can also be explained by a torque no...
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...
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.