A study of selected low-mass X-ray binary dip sources observed with INTEGRAL

Date

2007-08-17

Author

Balman, Şölen

Metadata

Show full item record

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

Item Usage Stats

20
views

0
downloads

I present archival data of the dipping LMXB systems, XB 1916-053, XB 1323-619, X1624-490, and 4U 1746-371obtained by the ISGRI and JEM-X detectors on-board the INTEGRAL Observatory. The spectral parameters derived from the fits to the data are consistent with hot coronal regions in these systems where the electron temperatures are in a range 4.9-18.8 keV with the exception of XB 1323-62 having an unbounded temperature. The optical depth to Compton scattering, tau is low and consistent with electron densities n(e) < 10 x 10(15) cm(-3). We interpret that the three of the dipping LMXBs in the scope of this work host hot extended large coronal structures which constitute a symmetric region on the disk responsible for the Comptonization in the systems. We find absorption differences between dipping and non-dipping intervals for XB 1916-053 and X 1624-490 in the JEM-X energy range. The dip and non-dip spectra in the ISGRI energy range (above 20 keV) show no significant difference four the sources. Fits including an additional photo-ionized absorber model for the two sources show that XB 1916-053 has the highest ionized absorber.

Subject Keywords

Stars : neutron, Stars : Coronae, X-Ray : Binaries, Accretion, Accretion Disks, Radiation Mechanisms : General

URI

https://hdl.handle.net/11511/54600

Collections

Department of Physics, Conference / Seminar

Suggestions

OpenMETU
Core

A comprehensive study of RXTE and INTEGRAL observations of the X-ray pulsar 4U 1907+09 Sahiner, S.; İNAM, SITKI ÇAĞDAŞ; Baykal, Altan (2012-04-01) We analyse observations of the accretion-powered pulsar 4U 1907+09 from the International Gamma-Ray Astrophysics Laboratory (INTEGRAL; between 2005 October and 2007 November) and from the Rossi X-ray Timing Explorer (RXTE; between 2007 June and 2011 March). Using observations from the Imager on-board the INTEGRAL satellite (IBIS), the INTEGRAL Soft Gamma-Ray Imager (ISGRI) and the RXTE Proportional Counter Array (PCA), we update the pulse period history of the source. We construct power spectrum density of ...
The broad-band noise characteristics of selected AXPs and SGRs: Probing the magnetar coronae Kulebi, Baybars; Balman, Şölen (2007-08-17) We present the broad-band noise structure of Anomalous X-Ray Pulsars (AXPs) and Soft Gamma Repeaters (SGRs) in the 2-60 keV energy band which are thought to be powered by either magnetic decay(Thompson & Duncan 1995) or accretion (Alpar 2001). We have used Rossi X-ray Timing Explorer (R-XTE) PCA archival light curves and derived time series for 4 AXPs and 1 SGR. We detect that AXP and SGR sources show band limited noise at low frequencies in the range 0.005-0.05 Hz. We find that this noise level can be asso...
A study of temeporal characteristics of selected Cataclysmic Variables: The broad-band noise structure between 2-20 kev Balman, Şölen; Kulebi, B; Beklen, E (2005-09-30) We present the preliminary analysis of the band-limited noise structure of Cataclysmic Variables (CVs) in the 220 keV energy band. We have currently analyzed Rossi X-ray Timing Explorer (RXTE) PCA data and derived time series from 30 CVs using the RXTE archive. In general, CVs of different types all show broad band noise which can be fitted with power laws, using exponential cut-offs, and Lorenzians in a similar way to power spectral (noise) characteristics of X-ray Binaries (XRBs). In general terms the pow...
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...
Comprehensive timing and X-ray spectral analysis of GX 1+4 Serim, M. M.; Sahiner, S.; Cerri-Serim, D.; İNAM, SITKI ÇAĞDAŞ; Baykal, Altan (2017-08-01) We present the analysis of RXTE-PCA observations of GX 1+4 between 2001 March 3 and 2003 January 31 together with the CGRO-BATSE X-ray flux and frequency derivative time series between 1991 and 1999. From the timing analysis of RXTE-PCA observations, we are able to phase connect pulse arrival times of the source within two different time intervals and obtain corresponding timing solutions. Using these pulse arrival times, we contribute to long-term pulse frequency history of the source. We look for episodic...

Citation Formats

Ş. Balman, “A study of selected low-mass X-ray binary dip sources observed with INTEGRAL,” 2007, vol. 983, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/54600.