Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
RXTE-PCA observations of XMMU J054134.7-682550
Download
index.pdf
Date
2009-05-21
Author
İNAM, SITKI ÇAĞDAŞ
Townsend, L. J.
McBride, V. A.
Baykal, Altan
Coe, M. J.
Corbet, R. H. D.
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
85
views
0
downloads
Cite This
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 is lower without any clear sign of a spin-down episode. The decrease in pulsed fraction with decreasing X-ray flux was interpreted as a sign of accretion geometry change, but we did not find any evidence of a transition from accretor to propeller regimes. The source was found to have variable pulse profiles. Two peaks in pulse profiles were usually observed. We studied the X-ray spectral evolution of the source throughout the observation. Pulse-phase-resolved analysis does not provide any further evidence for a cyclotron line, but may suggest a slight variation of intensity and width of the 6.4 keV iron line with phase.
Subject Keywords
Space and Planetary Science
,
Astronomy and Astrophysics
URI
https://hdl.handle.net/11511/41936
Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
DOI
https://doi.org/10.1111/j.1365-2966.2009.14659.x
Collections
Department of Physics, Article
Suggestions
OpenMETU
Core
Comprehensive analysis of the transient X-ray pulsar MAXI J1409 619
Donmez, C. K.; Serim, Muhammed Miraç; Inam, S. C.; Sahiner, S.; Serim, D.; Baykal, Altan (Oxford University Press (OUP), 2020-08-01)
We probe the properties of the transient X-ray pulsar MAXI J1409-619 through RXTE and Swift follow-up observations of the outburst in 2010. We are able to phase-connect the pulse arrival times for the 25 d episode during the outburst. We suggest that either an orbital model (with P-orb similar or equal to 14.7(4) d) or a noise process due to random torque fluctuations (with S-r approximate to 1.3 x 10(-18) Hz(2) S-2 Hz(-1)) is plausible to describe the residuals of the timing solution. The frequency derivat...
Discovery of a transient magnetar: XTE J1810-197
Ibrahim, AI; Markwardt, CB; Swank, JH; Ransom, S; Roberts, M; Kaspi, V; Woods, PM; Safi-Harb, S; Balman, Şölen; Parke, WC; Kouveliotou, C; Hurley, K; Cline, T (IOP Publishing, 2004-07-01)
We report the discovery of a new X-ray pulsar, XTE J1810 - 197, that was serendipitously discovered on 2003 July 15 by the Rossi X-Ray Timing Explorer (RXTE) while observing the soft gamma repeater SGR 1806 - 20. The pulsar has a 5.54 s spin period, a soft X-ray spectrum ( with a photon index of approximate to 4), and is detectable in earlier RXTE observations back to 2003 January but not before. These show that a transient outburst began between 2002 November 17 and 2003 January 23 and that the source's pe...
Analysis of RXTE-PCA Observations of SMC X-1
İNAM, SITKI ÇAĞDAŞ; Baykal, Altan; Beklen, E. (Oxford University Press (OUP), 2010-03-21)
We present timing and spectral analysis of Rossi X-ray Timing Explorer-Proportional Counter Array observations of SMCX-1 between 1996 January and 2003 December. From observations around 1996 August 30 with a time-span of similar to 6 d, we obtain a precise timing solution for the source and resolve the eccentricity as 0.00089(6). We find an orbital decay rate of (P) over dot(orb)/P(orb) = -3.402(7) x 10(-6) yr(-1) which is close to the previous results. Using our timing analysis and the previous studies, we...
ROSAT OBSERVATIONS OF PSR-0656+14 - A PULSATING AND COOLING NEUTRON-STAR
FINLEY, JP; OGELMAN, H; KIZILOGLU, U (American Astronomical Society, 1992-07-20)
PSR 0656+14, an X-ray-emitting radio pulsar, was observed for approximately 3200 s with the Position Sensitive Proportional Counter (PSPC) on board ROSAT on 1991 March 25. The source background-subtracted counting rate was 1.96+/-0.03 counts s-1. Pulsations at the radio period, approximately 0.385 s, were detected at a pulsed fraction of 14%+/-2% making PSR 0656+14 one of only a handful of known isolated X-ray-emitting pulsars. The spectral distribution of counts can be described by various model fits. A bl...
X-ray spectral evolution of Her X-1 in a low state and the following short high state
Inam, SC; Baykal, Altan (Oxford University Press (OUP), 2005-08-21)
We analysed spectral variations of similar to 8.5-d long Rossi X-ray Timing Explorer (RXTE) monitoring observations of Her X-1 in 2001 December. This set of observations enables, for the first time, frequent continuous monitoring (111 pointings in similar to 8.5 d) of the source with RXTE including a similar to 1.7-d-long low state part and the following similar to 6.8-d-long short high state part. We used an absorbed power-law model with an iron line energy complex modelled as a Gaussian to fit both the 3-...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
S. Ç. İNAM, L. J. Townsend, V. A. McBride, A. Baykal, M. J. Coe, and R. H. D. Corbet, “RXTE-PCA observations of XMMU J054134.7-682550,”
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
, pp. 1662–1668, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41936.