Rapid variability of the kHz-QPO frequency in 4U1608-52

Thumbnail Image

Date

Authors

Journal Title

Journal ISSN

Volume Title

Publisher

Abstract

Description

We investigate the variability of the QPO frequency in 4U1608-52 on very short time scales of a few seconds. We detect changes in frequency as fast as 0.5 Hz/s, which is more than ten times the fastest change reported for this object. Using a structure function analysis, we are able to detect variability on time scales as short as ~4 seconds. We do not detect any time asymmetry in the QPO-frequency history. These results have important consequences on the measurement of the QPO coherence.
Proceedings of the Annual meeting of the French Astronomical Society (SF2A), in press, 4 pages, 4 figures

Keywords

Astrophysics

Citation

URI

http://salesiana.dossiersoluciones.com/handle/123456789/8742

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/astro-ph/0412421
 http://arxiv.org/abs/astro-ph/0412421

Collections

arXiv