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Home All issues Volume 689 (September 2024) A&A, 689 (2024) A284 Full HTML
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Table 2.

Best-fit parameters for the XMM-Newton PDSs from LP observations.

ObsID νQPO ΔνQPO νchar, QPO QQPO rmsQPO νbroad Δνbroad νchar, broad Qbroad rmsbroad χ2/d.o.f.
(mHz) (mHz) (mHz) (%) (mHz) (mHz) (mHz) (%)
0.3–10 keV
A 0.449−0.022+0.019 0.088−0.035+0.054 0.451−0.022+0.019 5.1 29.0−4.0+3.8 1.20−0.27+0.26 2.60−0.53+0.67 1.77−0.27+0.30 0.5 37.9−2.6+2.7 27.74/35
B 0.470−0.017+0.012 0.046−0.046+0.053 0.470−0.017+0.011 10.2 27.4 ± 4.3 0.92−0.14+0.18 1.65−0.26+0.31 1.24−0.13+0.17 0.6 38.6−2.7+2.6 24.23/35
C (a) 0.519−0.033+0.036 0.183−0.061+0.069 0.527−0.033+0.036 2.8 32.0 ± 3.6 1.56−0.23+0.25 2.74−0.43+0.53 2.08−0.22+0.26 0.6 40.3 ± 2.6 46.66/37
A+B+C 0.565−0.036+0.034 0.269−0.054+0.067 0.581−0.035+0.034 2.1 29.5 ± 2.4 1.34 ± 0.17 2.45−0.31+0.37 1.81−0.16+0.18 0.5 36.1 ± 1.8 128.31/124
0.3–1.5 keV
A (b) 0.534−0.027+0.024 0.148−0.081+0.062 0.539−0.028+0.025 3.6 32.9−4.0+3.4 1.48−0.20+0.18 1.56−0.53+0.76 1.67−0.22+0.24 0.9 32.3−3.4+2.5 32.26/24
B 0.467−0.017+0.014 0.061−0.035+0.052 0.468−0.017+0.014 7.6 29.7−4.5+4.2 1.04−0.18+0.40 1.21−0.48+0.76 1.20−0.19+0.39 0.9 29.7−3.5+3.7 43.13/35
C 0.484−0.028+0.031 0.184−0.063+0.058 0.493−0.028+0.031 2.6 31.8−3.6+3.5 1.54−0.24+0.21 1.81−0.42+0.43 1.79−0.24+0.21 0.9 33.8 ± 3.2 25.33/35
1.5–10 keV
A (b) 0.509−0.044+0.072 0.25−0.10+0.22 0.525−0.045+0.075 2.0 36.9−5.5+5.1 1.52−0.43+0.26 1.21−0.63+0.66 1.64−0.42+0.27 1.3 32.7−6.3+7.6 34.30/23
B 0.469−0.022+0.014 0.047−0.047+0.067 0.470−0.022+0.014 9.9 25.8 ± 5.3 1.03−0.18+0.19 1.68−0.31+0.38 1.33−0.17+0.19 0.6 46.3−3.3+3.8 22.67/35
C 0.538−0.041+0.028 0.26−0.10+0.12 0.553−0.042+0.030 2.1 34.6 ± 5.4 1.27−0.53+0.71 4.08−0.81+0.98 2.40−0.44+0.55 0.3 47.5−4.9+3.9 34.71/35

Notes. Parameters of the Lorentzians obtained from the fit of the 0.3–10 keV, 0.3–1.5 keV, and 1.5–10 keV PDSs of our LP observations. νx: centroid frequency of the Lorentzian x. Δνx: full width at half maximum (FWHM) of the Lorentzian x. νchar, x: characteristic frequency of the Lorentzian x. Qx = νx/Δνx: approximate quality factor of the Lorentzian x. rmsx: rms fractional variability of the Lorentzian x. Errors given at 1σ (68.3%) confidence level. Two additional components have been added to the fit to take into account the white and red noise at high and low frequencies, respectively.

(a)

Due to poor statistics at low frequencies, we froze red-noise parameters at the best-fit values estimated before the addition of the two Lorentzians.

(b)

Geometric rebin changed to a factor 30%, due to poor statistics.

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