Long term variability of Cyg X-1. II. The rms-flux relation
| dc.contributor.author | Gleissner, T. | |
| dc.contributor.author | Wilms, J. | |
| dc.contributor.author | Pottschmidt, Katja | |
| dc.contributor.author | Uttley, P. | |
| dc.contributor.author | Nowak, M. A. | |
| dc.contributor.author | Staubert, R. | |
| dc.date.accessioned | 2023-10-12T21:50:53Z | |
| dc.date.available | 2023-10-12T21:50:53Z | |
| dc.date.issued | 2004-01-27 | |
| dc.description.abstract | We study the long term evolution of the relationship between the root mean square (rms) variability and flux (the “rms-flux relation”) for the black hole Cygnus X-1 as monitored from 1996 to 2003 with the Rossi X-ray Timing Explorer (RXTE). We confirm earlier results by [CITE] of a linear relationship between rms and flux in the hard state on time scales >5 s reflecting in its slope the fractional rms variability. We demonstrate the perpetuation of the linear rms-flux relation in the soft and the intermediate state. The existence of a non-zero intercept in the linear rms-flux relation argues for two lightcurve components, for example, one variable and one non-variable component, or a possible constant rms component. The relationship between these two hypothesized components can be described by a fundamental dependence of slope and intercept at time scales <∼10 ksec with long term averages of the flux. | en |
| dc.description.sponsorship | This work has been financed by grant Sta 173/25 of the Deutsche Forschungsgemeinschaft. We thank Sara Benlloch for helpful discussions and Ron Remillard for generously supplying TOO data. This research has made use of data obtained from the High Energy Astrophysics Science Archive Research Center (HEASARC), provided by NASA’s Goddard Space Flight Center. JW thanks the Instituto Nacional de Pesquisas Espaciais, S˜ao Jos´e dos Campos, Brazil, for its hospitality during the finalization of this paper. | en |
| dc.description.uri | https://www.aanda.org/articles/aa/abs/2004/06/aah4744/aah4744.html | en |
| dc.format.extent | 14 pages | en |
| dc.genre | journal articles | en |
| dc.identifier | doi:10.13016/m2zhid-soc7 | |
| dc.identifier.citation | Gleissner, T., J. Wilms, K. Pottschmidt, P. Uttley, M. A. Nowak, and R. Staubert. “Long Term Variability of Cyg X-1 - II. The Rms-Flux Relation.” Astronomy & Astrophysics 414, no. 3 (February 1, 2004): 1091–1104. https://doi.org/10.1051/0004-6361:20031684. | en |
| dc.identifier.uri | https://doi.org/10.1051/0004-6361:20031684 | |
| dc.identifier.uri | http://hdl.handle.net/11603/30128 | |
| dc.language.iso | en | en |
| dc.publisher | EDP Sciences | en |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Center for Space Sciences and Technology | |
| dc.relation.ispartof | UMBC Physics Department | |
| dc.rights | Attribution 4.0 International (CC BY 4.0) | * |
| dc.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. | en |
| dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | * |
| dc.title | Long term variability of Cyg X-1. II. The rms-flux relation | en |
| dc.type | Text | en |
| dcterms.creator | https://orcid.org/0000-0002-4656-6881 | en |