Timing studies on RXTE observations of SAX J2103.5+4545

Download

index.pdf

Date

2007-01-21

Author

Baykal, Altan
Stark, M. J.
Heffner, C. M.
Erkoca, A. E.
Swank, J. H.

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

178
views

0
downloads

SAX J2103.5+4545 has been continuously monitored for similar to 900 d by the Rossi X-ray Timing Explorer (RXTE) since its outburst in 2002 July. Using these observations and previous archival RXTE observations of SAX J2103.5+4545, we refined the binary orbital parameters and find the new orbital period as P = (12.665 36 +/- 0.000 88) d and the eccentricity as 0.4055 +/- 0.0032. With these new orbital parameters, we constructed the pulse frequency and pulse frequency derivative histories of the pulsar and confirmed the correlation between X-ray flux and pulse frequency derivative presented by Baykal, Stark & Swank. We constructed the power spectra for the fluctuations of pulse frequency derivatives and found that the power-law index of the noise spectra is 2.13 +/- 0.6. The power-law index is consistent with random walk in pulse frequency derivative and is the steepest among the HMXRBs. X-ray spectra analysis confirmed the inverse correlation trend between power-law index and X-ray flux found by Baykal et al.

Subject Keywords

Accretion, Accretion discs, Stars, Neutron, Pulsars, Individual, SAX J2103.5+4545, X-rays, Binaries

URI

https://hdl.handle.net/11511/41726

Journal

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

DOI

https://doi.org/10.1111/j.1365-2966.2006.11231.x

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Timing studies of X Persei and the discovery of its transient quasi-periodic oscillation feature Acuner, Z.; İNAM, SITKI ÇAĞDAŞ; Sahiner, S.; Serim, Muhammed Miraç; Baykal, Altan; Swank, J. (2014-10-11) We present a timing analysis of X Persei (X Per) using observations made between 1998 and 2010 with the Proportional Counter Array (PCA) onboard the Rossi X-ray Timing Explorer (RXTE) and with the INTEGRAL Soft Gamma-Ray Imager (ISGRI). All pulse arrival times obtained from the RXTE-PCA observations are phase-connected and a timing solution is obtained using these arrival times. We update the long-term pulse frequency history of the source by measuring its pulse frequencies using RXTE-PCA and ISGRI data. Fr...
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...
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...
Short-term pulse frequency fluctuations of OAO 1657-415 from RXTE observations Baykal, Altan (2000-04-11) We present new X-ray observations of the high-mass X-ray binary (HMXRB) pulsar OAO 1657-415, obtained during one orbital period (10.44 d) with the Rossi X-Ray Timing Explorer (RXTE). Using the binary orbital parameters, obtained from Burst and Transient Source Experiment (BATSE) observations, we resolve the fluctuations in the pulse frequency at time-scales on the order of 1 d for the first time. Recent BATSE results by Baykal showed that OAO 1657-415 has spin-up/down trends in its pulse frequency time seri...
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...

Citation Formats

A. Baykal, M. J. Stark, C. M. Heffner, A. E. Erkoca, and J. H. Swank, “Timing studies on RXTE observations of SAX J2103.5+4545,” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, pp. 1108–1114, 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41726.