A continuous Flaring- to Normal-branch transition in Sco X-1

Details A continuous Flaring- to Normal-branch transition in Sco X-1 A continuous Flaring- to Normal-branch transition in Sco X-1

2005-06-21

arxiv.org/abs/astro-ph/0506483v1

Astronomy and Astrophysics

Astrophysics

5 pages, 4 figures, accepted for publication in Astronomy & Astrophysics

Scientific paper

10.1051/0004-6361:20052912

We report the first resolved rapid transition from a Flaring Branch Oscillation to a Normal Branch Oscillation in the RXTE data of the Z source Sco X-1. The transition took place on a time scale of ~100 seconds and was clearly associated to the Normal Branch-Flaring Branch vertex in the color-color diagram. We discuss the results in the context of the possible association of the Normal Branch Oscillation with other oscillations known both in Neutron-Star and Black-Hole systems, concentrating on the similarities with the narrow 4-6 Hz oscillations observed at high flux in Black-Hole Candidates.

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