Studies of quasi-periodic oscillations in the black hole transient XTE J 1817-330

Roy, Jayashree ; Agrawal, P. C. ; Paul, B. ; Duorah, K. (2010) Studies of quasi-periodic oscillations in the black hole transient XTE J 1817-330 Monthly Notices of the Royal Astronomical Society . pp. 1-16. ISSN 0035-8711

Full text not available from this repository.

Official URL:


We have used archival RXTE PCA data to investigate timing and spectral characteristics of the transient XTE J1817-330. The data pertains to 160 PCA pointed observations made during the outburst period 2006, January 27 to August 2. A detailed analysis of Quasi-Periodic Oscillations (QPOs) in this black hole X-ray binary is carried out. Power density spectra were obtained using the light curves of the source. QPOs have been detected in the 2-8 keV band in 10 of the observations. In 8 of these observations, QPOs are present in the 8-14 keV and in 5 observations in the 15-25 keV band. XTE J1817-330 is the third black hole source from which the low frequency QPOs are clearly detected in hard X-rays. The QPO frequency lies in ≈ 4-9 Hz and the rms amplitude in 1.7-13.3% range, the amplitude being higher at higher energies. We have fitted the PDS of the observations with Lorentzian and power law models. Energy spectra are derived for those observations in which the QPOs are detected to investigate any dependence of the QPO characteristic on the spectral parameters. These spectra are well fitted with a two component model that includes the disk black body component and a power law component. The QPO characteristics and their variations are discussed and its implication on the origin of the QPOs are examined.

Item Type:Article
Source:Copyright of this article belongs to John Wiley and Sons.
ID Code:87113
Deposited On:15 Mar 2012 11:22
Last Modified:15 Mar 2012 11:22

Repository Staff Only: item control page