J/MNRAS/428/1704ivo://CDS.VizieR/J/MNRAS/428/1704doi:10.26093/cds/vizier.74281704CDSLi Z.B.Qu J.L.Song L.M.Ding G.Q.Zhang C.M.2024-07-20T20:13:12Z2014-02-18T15:39:13ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frx-ray-binary-starsIn this paper, we investigate the energy dependence of the centroid frequency of the low-frequency quasi-periodic oscillations (QPOs; 0.08-20Hz) in XTE J1550-564. We have used the observational data from the Rossi X-ray Timing Explorer during the first half part of the 1998-1999 outburst. We have found that the centroid frequency of the fundamental QPO did not vary with photon energy when its QPO frequency was less than ~0.4-0.8Hz and it did not increase much when its frequency was between ~0.8 and ~3.3Hz. However, it clearly increased with photon energy when it was larger than ~3.3Hz. The most interesting point is that it increased much more quickly with photon energy when its centroid frequency was between ~6 and ~8.5Hz. Subsequently, its rising rate dropped sharply when its frequency was larger than ~8.5Hz.2013MNRAS.428.1704Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/428/1704CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/496/765 : R light-curve of TT Ari (Kim+, 2009)J/A+A/265/77 : VBLUW Observations of TT Ari (Hollander+ 1992)J/ApJ/728/9 : QPO from XTE J1701-462 (Barret+, 2011)J/MNRAS/426/1701 : High-frequency QPO in black hole binaries (Belloni+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/428/1704https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/428/1704http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/428/1704https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/428/1704https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/428/1704http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/428/1704GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/MNRAS/428/1704/QPOsCombined table from original tableschi2{chi}^2^ valuestat.fit.chi2floatAmpAmplitude of oscillation%src.var.amplitude;arith.ratiofloate_Amprms uncertainty on Amplitude (95% confidence)%stat.errorfloatSlopeSlope of frequency versus energy relationarith.grad;em.freq;stat.fit.omcdoublee_Sloperms uncertainty on Slopestat.errordoubleCorr[-1/1] Correlation coefficient frequency/energystat.correlationfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintModeOscillation mode: 1=Fundamental (table1), 2=First harmonic (table2), and 3=Subharmonic (table3)meta.id;meta.datasetintnullableObsIDObservation ID of those observations exhibiting low frequency QPOsmeta.id;em.freq;obscharMJDModified Julian datedtime.epochdoubleb_FreqLower value of frequency rangeHzem.freq;stat.minfloatB_FreqUpper value of frequency rangeHzem.freq;stat.maxfloatFreqQPO frequency (1)Hzem.freq;src.varfloate_Freqrms uncertainty on QPO frequencyHzstat.errorfloatdof[12/79] Degrees of freedomstat.fit.dofint