Monitoring the short-term variability of Cyg X-1: Spectra and timing
| dc.contributor.author | Pottschmidt, Katja | |
| dc.contributor.author | Wilms, J. | |
| dc.contributor.author | Staubert, R. | |
| dc.contributor.author | Nowak, M. A. | |
| dc.contributor.author | Dove, J. B. | |
| dc.contributor.author | Heindl, W. A. | |
| dc.contributor.author | Smith, D. M. | |
| dc.date.accessioned | 2023-10-12T21:52:24Z | |
| dc.date.available | 2023-10-12T21:52:24Z | |
| dc.date.issued | 2000-04-12 | |
| dc.description | THE FIFTH COMPTON SYMPOSIUM, 15-17 Sep 1999, Portsmouth, New Hampshire (USA) | en_US |
| dc.description.abstract | We present first results from the spectral and temporal analysis of an RXTE monitoring campaign of the black hole candidate Cygnus X-1 in 1999. The timing properties of this hard state black hole show considerable variability, even though the state does not change. This has previously been noted for the power spectral density, but is probably even more pronounced for the time lags. From an analysis of four monitoring observations of Cyg X-1, separated by 2 weeks from each other, we find that a shortening of the time lags is associated with a hardening of the X-ray spectrum, as well as with a longer characteristic “shot time scale.” We briefly discuss possible physical/geometrical reasons for this variability of the hard state properties. | en_US |
| dc.description.sponsorship | We thank all participants in the 1999 broad band campaign for their continued effort to obtain simultaneous radio through X-ray observations of Cygnus X-1. This work has been partially financed by DFG grant Sta 173/22 and a travel grant by the Deutsche Forschungsgemeinschaft to JW. | en_US |
| dc.description.uri | https://pubs.aip.org/aip/acp/article-abstract/510/1/109/559148/Monitoring-the-short-term-variability-of-Cyg-X-1 | en_US |
| dc.format.extent | 5 pages | en_US |
| dc.genre | conference papers and proceedings | en_US |
| dc.genre | preprints | en_US |
| dc.identifier | doi:10.13016/m2funt-jlka | |
| dc.identifier.citation | K. Pottschmidt, J. Wilms, R. Staubert, M. A. Nowak, J. B. Dove, W. A. Heindl, D. M. Smith; Monitoring the short-term variability of Cyg X-1: Spectra and timing. AIP Conf. Proc. 12 April 2000; 510 (1): 109–113. https://doi.org/10.1063/1.1303184 | en_US |
| dc.identifier.uri | https://doi.org/10.1063/1.1303184 | |
| dc.identifier.uri | http://hdl.handle.net/11603/30136 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | AIP | en_US |
| 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 | This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in K. Pottschmidt, J. Wilms, R. Staubert, M. A. Nowak, J. B. Dove, W. A. Heindl, D. M. Smith; Monitoring the short-term variability of Cyg X-1: Spectra and timing. AIP Conf. Proc. 12 April 2000; 510 (1): 109–113. https://doi.org/10.1063/1.1303184 and may be found at https://pubs.aip.org/aip/acp/article-abstract/510/1/109/559148/Monitoring-the-short-term-variability-of-Cyg-X-1. | en_US |
| dc.title | Monitoring the short-term variability of Cyg X-1: Spectra and timing | en_US |
| dc.type | Text | en_US |
| dcterms.creator | https://orcid.org/0000-0002-4656-6881 | en_US |