Quasi-periodic oscillations in the Z source GX 340 + 0
نویسندگان
چکیده
منابع مشابه
A pr 1 99 8 Discovery of kilohertz quasi - periodic oscillations in the Z source GX 340 + 0
We have discovered two simultaneous kHz quasi-periodic oscillations (QPOs) in the Z source GX340+0 with the Rossi X-ray Timing Explorer. The X-ray hardness-intensity and color-color diagram each show a full Z-track, with an extra limb branching off the flaring branch of the Z. Both peaks moved to higher frequencies when the mass accretion rate increased. The two peaks moved from 247± 6 and 567±...
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We present an analysis of ∼390 ksec of data of the Z source GX 340+0 taken during 24 observations with the Rossi X -rayTiming Explorer satellite. We report the discovery of a new broad component in the power spectra. The frequency of this component varied between 9 and 14 Hz, and remained close to half that of the horizontal branch quasi-periodic oscillations (HBO). Its rms amplitude was consis...
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We observed the low-mass X-ray binary and Z source GX 17+2 with the Rossi Xray Timing Explorer during 6–8 Feb 1997, 1–4 Apr 1997, and 26–27 Jul 1997. The X-ray color-color diagram shows a clear Z track. Two simultaneous kHz quasi-periodic oscillations (QPOs) are present in each observation, whose frequencies are well correlated with the position of the source on the Z-track. At the left end of ...
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During observations with the Rossi X-Ray Timing Explorer from 1997 June 31 to July 3 we discovered two simultaneous kHz quasi-periodic oscillations (QPOs) near 500 and 860 Hz in the low-mass X-ray binary and Z source Cygnus X-2. In the X-ray color-color diagram and hardness-intensity diagram (HID), a clear Z track was traced out, which shifted in the HID within 1 day to higher count rates at th...
متن کاملThe Abc of Low-frequency Quasi-periodic Oscillations in Black-hole Candidates: Analogies with Z-sources
Three main types of low-frequency quasi-periodic oscillations (LFQPOs) have been observed in Black Hole Candidates. We re-analyzed RXTE data of the bright systems XTE J1859+226, XTE J1550-564 and GX 339-4, which show all three of them. We review the main properties of these LFQPOs and show that they follow a well-defined correlation in a fractional rms vs. softness diagram. We show that the fre...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1991
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/249.1.113