A continuous Flaring- to Normal-branch transition in Sco X-1
Astrophysics
2009-11-11 v1
Abstract
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.
Cite
@article{arxiv.astro-ph/0506483,
title = {A continuous Flaring- to Normal-branch transition in Sco X-1},
author = {Piergiorgio Casella and Tomaso Belloni and Luigi Stella},
journal= {arXiv preprint arXiv:astro-ph/0506483},
year = {2009}
}
Comments
5 pages, 4 figures, accepted for publication in Astronomy & Astrophysics