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Table 1

Power spectral density (PSD) index α and half-width at half-maximum of the success fraction (SuF) for light curves with more than 30 flux measurements.

Instrument α a HWHM
OVRO 2.0 1.2 − 2.3 b
GRT I 1.5 0.7
MITSuME Ic 1.6 0.7
GASP 1.9 0.5
GRT R 1.4 0.8
GRT V 1.5 0.5
MITSuME g 1.5 0.6
GRT B 1.4 1.0
UVOT W1 1.4 0.5
Swift/XRT (0.3–2 keV) 1.5 0.6
Swift/XRT (2–10 keV) 1.4 0.6
RXTE/PCA 1.4 0.6
Fermi-LAT 1.0 − 2.8 c
MAGIC 1.6 0.9
Whipple 1.3 0.6

Notes.

(a)

Slope of a power-law P(ν) ∝ ν− α.

(b)

The SuF vs. α curve is asymmetric, thus the PSD of OVRO is not very well constrained. This might be due to the very low variability in radio compared to the other wavelengths.

(c)

The PSD of Fermi-LAT is largely unconstrained because of the large flux measurement errors. The SuF is approximately constant and high (>0.8) over a large α range with no clear maximum.

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