X-ray Observations Of The Black Hole Binary

The X-ray spectral and timming analysis can give us some very useful information of the compact objects. There are a number of supposed black hole SXTs that do not show a soft component in their X-ray spectra. Instead they remain in the low/hard state throughout the outburst. A new black hole X-ray transient (SWIFT J1753.5-0127) was detected firstly by SWIFT, likely belongs to the subset of BHCs. With the observational data of RXTE and SWIFT, we investigated the timing and spectral character of this X-ray transient.The first chapter of this thesis gives the introductions of the history and status of the background of X-ray astronomy. In chapter 2, we give a brief description of RXTE and SWIFT used in our thesis then give a detailed description of the data analysis by XRT on board SWIFT.In chapter 3, we first give a brief introduction of these sources with almost only the low/hard state while in their outburst, which belongs to a small subset of BHCs and introduce the new BHC SWIFT J1753.5– 0127. Then, we give detailed spectral and timming analysis of the sources. The spectral analysis shows that the emissions are dominated by the hard X-rays. This indicates that SWIFT J1753.5– 0127 was in the low/hard state during its outburst. Furthermore, the low-frequency quasi-periodic oscillation (hereafter QPO) was detected in the power density spectra, and the QPO frequencies are found to vary roughly linearly with the fluxes and the spectral indices. The anti-correlation between the QPO frequency and spectral color suggests that the global disk oscillation model proposed by Titarchuk & Osherovich (2000) is not likely at work. The author also participated in the spectral and timing analyses of the HMXB 4U1901+03. To analysis of the timing evolution of the pulse profiles and the pulse-phase dependence of the spectra, we found the shape of the pulse profiles seemed to evolve stage by stage which suggested the instability of the accretion rate.