Table 7.
Slopes β obtained from fitting the γ-ray power spectra with a simple power-law model, and the corresponding success fraction calculated based on the PSRESP method (Uttley et al. 2002) (see Sect. 4.1) (the success fractions indicate the goodness of fit obtained from the PSRESP method).
| Source | Simulation method |
Monthly |
Weekly |
|||
|---|---|---|---|---|---|---|
| PSRESP | Simulation | PSD-slope | Success fraction | PSD-slope | Success fraction | |
| model | algorithm | βm | [%] | βw | [%] | |
| PG 1553+113 | Power law | Timmer & Koenig | 0.88 ± 0.13 | 96.0 ± 3.2 | 0.66 ± 0.11 | 82.4 ± 3.5 |
| Power law | Emmanoulopoulos | 0.90 ± 0.14 | 93.0 ± 2.9 | 0.67 ± 0.11 | 84.8 ± 3.6 | |
| PKS 0447−439 | Power law | Timmer & Koenig | 1.06 ± 0.15 | 98.4 ± 3.0 | 0.79 ± 0.13 | 104.1 ± 5.3 |
| Power law | Emmanoulopoulos | 1.07 ± 0.13 | 83.5 ± 5.2 | 0.80 ± 0.13 | 104.5 ± 5.1 | |
| PKS 2155−304 | Power law | Timmer & Koenig | 0.95 ± 0.13 | 97.4 ± 3.1 | 0.88 ± 0.09 | 89.1 ± 3.3 |
| Power law | Emmanoulopoulos | 0.99 ± 0.14 | 94.4 ± 2.7 | 0.89 ± 0.09 | 90.5 ± 3.6 | |
| PKS 0426−380 | Power law | Timmer & Koenig | 0.98 ± 0.22 | 95.1 ± 5.0 | 1.08 ± 0.08 | 96.5 ± 3.6 |
| Power law | Emmanoulopoulos | 1.02 ± 0.23 | 88.6 ± 4.1 | 1.09 ± 0.09 | 94.2 ± 3.7 | |
| PKS 0301−243 | Power law | Timmer & Koenig | 0.32 ± 0.20 | 96.9 ± 3.6 | 0.53 ± 0.14 | 94.8 ± 5.3 |
| Power law | Emmanoulopoulos | 0.36 ± 0.22 | 95.1 ± 2.9 | 0.58 ± 0.15 | 93.9 ± 3.2 | |
Notes. The β values have been determined using both monthly and weekly light curves, as well as the Timmer & Koenig (1995) and Emmanoulopoulos et al. (2013) simulation methods. The errors are results from fitting Gaussians to each of the slope profiles.
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