Evidence of Class Transitions in GRS 1915+105 from IXAE Data

Details Evidence of Class Transitions in GRS 1915+105 from IXAE Data Evidence of Class Transitions in GRS 1915+105 from IXAE Data

2005-01-14

arxiv.org/abs/astro-ph/0501282v1

Astrophys.J. 607 (2004) 406

Astronomy and Astrophysics

Astrophysics

14 pages, 3 figures, Astrophysical Journal

Scientific paper

10.1086/383235

GRS 1915+105 shows at least twelve distinct classes of light curves. By analysing the data obtained from Indian X-ray Astronomy Experiment (IXAE) instrument aboard IRS-P3 satellite, we show that in at least two days, transitions between one class to another were observed. In these days the so-called $\kappa$ class went to $\rho$ class and $\chi$ class went to $\rho$ class. In the frequency-time plane such transitions exhibited change in quasi-periodic oscillation (QPO) frequency. We could detect that low-frequency QPOs can occur in anticipation of a class transition several hundred minutes before the actual transition

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