X-Ray Observations of XTE J1550–564 during the Decay of the 2000 Outburst. II. Timing

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dc.contributor.authorKalemci, E.
dc.contributor.authorTomsick, J. A.
dc.contributor.authorRothschild, R. E.
dc.contributor.authorPottschmidt, Katja
dc.contributor.authorKaaret, P.
dc.date.accessioned2023-10-12T19:21:07Z
dc.date.available2023-10-12T19:21:07Z
dc.date.issued2001-12-10
dc.description.abstractWe investigate the timing behavior of XTE J1550-564 with the Rossi X-Ray Timing Explorer as the source made a transition to the hard state during the decay of the 2000 outburst. We detect a high-frequency quasi-periodic oscillation (QPO) at 65 Hz in one observation with a fractional rms amplitude of 4.9%. This is the first time that a high-frequency QPO has been detected in a transition to the hard state during outburst decay. We also observe low-frequency QPOs in the 0.36-4.1 Hz range and rich aperiodic variability. The changes in the temporal properties during the decay are very similar to the state transitions observed for other sources. We find a correlation between the low-frequency QPO and the break frequency in the continuum power spectra. We investigate the energy dependence of rms amplitudes of the QPOs. We compare these timing properties with those previously observed for XTE J1550-564 and other Galactic black hole candidates and discuss the implications for QPO models and black hole accretion.en_US
dc.description.sponsorshipE. K. acknowledges useful discussions with Jorn Wilms and Wayne Coburn. The authors would like to thank all scientists who contributed to the Tubingen Timing Tools. This material is based in part upon work supported by the National Aeronautics and Space Administration under grants NAG 5-30120 and NAG 5-10886. E. K. was partially supported by TUBITAK. K. P. is supported by DFG grant Sta 173/25-3 and a travel grant from the DAAD and would like to thank CASS for its hospitality. P. K. acknowledges partial support from NASA grant NAG 5-7405.en_US
dc.description.urihttps://iopscience.iop.org/article/10.1086/323690en_US
dc.format.extent7 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2canl-eyjy
dc.identifier.citationKalemci, E., J. A. Tomsick, R. E. Rothschild, K. Pottschmidt, and P. Kaaret. “X-Ray Observations of XTE J1550–564 during the Decay of the 2000 Outburst. II. Timing.” The Astrophysical Journal 563, no. 1 (December 10, 2001): 239. https://doi.org/10.1086/323690.en_US
dc.identifier.urihttps://doi.org/10.1086/323690
dc.identifier.urihttp://hdl.handle.net/11603/30120
dc.language.isoen_USen_US
dc.publisherIOP Publishingen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Center for Space Sciences and Technology
dc.relation.ispartofUMBC Physics Department
dc.rightsThis 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_US
dc.titleX-Ray Observations of XTE J1550–564 during the Decay of the 2000 Outburst. II. Timingen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0002-4656-6881en_US

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