Time Lags of Z Source GX 5-1
Source: Astrophysics and Space Science, Volume 293, Number 4, October 2004 , pp. 441-451(11)
Abstract:We investigated the time lags and the evolution of the cross spectra of Z source GX 5-1, observed by the Rossi X-ray Timing Explorer (RXTE), when it is in the horizontal branch oscillations. We showed that the time lags of three horizontal branch oscillations are related to the position on the hardness intensity diagram. All of the three QPOs were shown to have hard time lags. However on the cross spectra, one is in a ‘dip’, one in a ‘bump’, the other has not so obvious characteristic. The time lags of two of the QPOs decrease with QPO’s frequency, while the other has a trend increasing with its frequency. Moreover, in the normal branch, we found no significant time lags in the present observational data.
Document Type: Research Article
Affiliations: 1: Laboratory for Particle Astrophysics, Institute of High Energy Physics, CAS, Beijing, 100039, P. R. China, Email: email@example.com 2: Laboratory for Particle Astrophysics, Institute of High Energy Physics, CAS, Beijing, 100039, P. R. China,
Publication date: October 1, 2004