Timescale Resolved Spectroscopy of Cyg X-1

Autor:	Wu, Y. X., Li, T. P., Belloni, T. M., Wang, T. S., Liu, H.
Rok vydání:	2009
Předmět:	Astrophysics - Instrumentation and Methods for Astrophysics Astrophysics - High Energy Astrophysical Phenomena
Zdroj:	Astrophys.J.695:921-929,2009
Druh dokumentu:	Working Paper
DOI:	10.1088/0004-637X/695/2/921
Popis:	We propose the timescale-resolved spectroscopy (TRS) as a new method to combine the timing and spectral study. TRS is based on the time domain power spectrum and reflects the variable amplitudes of spectral components on different timescales. We produce the TRS with the RXTE PCA data for Cyg X-1 and studied the spectral parameters (the power law photon index and the equivalent width of the iron fluorescent line) as a function of timescale. The results of TRS and frequency-resolved spectra (FRS) have been compared, and similarities have been found for the two methods with the identical motivations. We also discover the correspondences between the evolution of photon index with timescale and the evolution of the equivalent width with timescale. The observations can be divided into three types according to the correspondences and different type is connected with different spectral state. Comment: 30 pages, 11 figures, To be published in Astrophysical Journal, accepted 01/2009
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0903.4118 Zobrazit plný text záznamu View this record from Arxiv