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RXTE Observations of XTE J1550–564 during its 2000 outburst

By J. Rodriguez, S. Corbel, E. Kalemci and J. A. Tomsick


We report on timing and spectral observations of the microquasar XTE J1550−564 during its 2000 outburst made by the Rossi X-ray Timing Experiment (RXTE). We study the spectral properties of the source during both the rise to the outburst and its decline. We observe transitions from a low hard state to an intermediate state, and vice versa, before the source returns to quiescence. We show that the first transition likely reflects a change in the relative importance of the emitting media, instead of a change in the total accretion rate, contrary to the second transition. We investigate the temporal properties of the source, and follow the evolution of a low frequency Quasi Periodic Oscillations (QPO).

Year: 2002
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