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A study of the low-frequency quasi-periodic oscillations in the X-ray light curves of the black hole candidate XTE J1859+226

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arxiv astro-ph/0407262 v1 pith:PNPCLU4Q submitted 2004-07-13 astro-ph

Piergiorgio Casella (INAF - Oss. Roma; Univ. Roma Tre) , Tomaso Belloni (INAF Oss. Brera) , Jeroen Homan (MIT) , Luigi Stella (INAF - Oss. Roma) This is my paper · ORCID
classification astro-ph
keywords frequencyx-rayblackholeobservedcandidatedifferentj1859
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We present the results of an extensive timing analysis of the 1999 outburst of the soft X-ray transient and black hole candidate XTE J1859+226 as observed with the Rossi X-Ray Timing Explorer. Three main different types of low frequency (1-9 Hz) quasi-periodic oscillations (QPOs) were observed and classified, strenghtening the general picture that is emerging for the variability properties of black hole X-ray binaires. Rapid transitions between different power spectral shapes were observed and their link with the count rate was studied. Furthermore, we show that a frequency of ~6 Hz seems to hold a particular place: one of the three QPO types we found was very stable when at this frequency, as it happens in Z sources as well. The coherence of its subharmonic peak was higher when the fundamental was close to 6 Hz, thus suggesting the presence of some resonance at this frequency.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Discovery of a quasi-periodic oscillation non-harmonically related to the Type-C QPO in the hard intermedidate state of MAXI J1820+070

    astro-ph.HE 2026-06 unverdicted novelty 7.0 of 10

    Detection of a non-harmonic QPO precursor to Type-B in the HIMS of MAXI J1820+070 using NICER timing data.

  2. An atypical X-ray variability component in the black hole candidate AT2019wey

    astro-ph.HE 2026-06 unverdicted novelty 5.0 of 10

    Detection of an imaginary QPO in AT2019wey whose frequency drops from ~5 Hz to ~1 Hz with rising phase lags as the source transitions through HIMS and LHS, showing U-shaped phase-lag spectrum in HIMS.

  3. Spectro-temporal Investigation of Quasi-periodic Oscillations From Black Hole X-ray Binary 4U 1630-472 Using $\textit{NICER}$

    astro-ph.HE 2025-01 conditional novelty 5.0 of 10

    Type-C QPOs in the 2021 outburst of 4U 1630-472 show a strong photon index versus frequency correlation and a significant Q-factor break at about 2.31 Hz.

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