Short term X-ray rms variability of Cyg X-1

Files

0207610.pdf (257.92 KB)

Links to Files

https://arxiv.org/abs/astro-ph/0207610

Permanent Link

https://doi.org/10.48550/arXiv.astro-ph/0207610
 http://hdl.handle.net/11603/30117

Collections

UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
UMBC Physics Department

Author/Creator

Author/Creator ORCID

https://orcid.org/0000-0002-4656-6881

Date

2002-07-29

Type of Work

journal articles
preprints
Text

Department

Program

Citation of Original Publication

Rights

This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.

Subjects

Abstract

A linear dependence of the amplitude of broadband noise variability on flux for GBHC and AGN has been recently shown by Uttley & McHardy (2001). We present the long term evolution of this rms-flux-relation for Cyg X-1 as monitored from 1998-2002 with RXTE. We confirm the linear relationship in the hard state and analyze the evolution of the correlation for the period of 1996-2002. In the intermediate and the soft state, we find considerable deviations from the otherwise linear relationship. A possible explanation for the rms-flux-relation is a superposition of local mass accretion rate variations.