Table 4.
Results of the model fits to the spectra of NGC 5548.
| Parameter | Epoch A | Epoch B | Epoch C | Epoch D | Epoch E | Epoch F |
|---|---|---|---|---|---|---|
| Model I : const*TBabs*zTBabs(zpo + zgauss) | ||||||
| Γ | 1.62 |
1.60 |
1.59 |
1.64 |
1.57 |
1.57 |
| NH(zTBabs) | 3.89 |
< 3.21 | 6.29 |
2.70 |
8.97 |
< 1.28 |
| E | 6.37 |
6.33 |
6.32 |
6.38 |
6.66 |
6.31 |
| EW | 70 |
89 |
117 |
107 |
114 |
137 |
| Norm | 100 |
86 |
79 |
93 |
77 |
67 |
| χ2/d.o.f. | 684/643 | 612/634 | 880/811 | 890/813 | 840/810 | 692/692 |
| CFPMA/FPMB | 1.02 |
1.05 |
1.02 |
1.05 |
1.02 |
1.05 |
| Model II : const*TBabs*zTBabs(pexrav + zgauss) | ||||||
| Γ | 1.75 |
1.81 |
1.62 |
1.79 |
1.61 |
1.81 |
| NH(zTBabs) | 6.06 |
4.77 |
5.61 |
4.46 |
6.91 |
3.66 |
| Ecut | > 345 | > 502 | 152 |
> 170 | 160 |
> 414 |
| R | 0.19 |
0.35 |
0.28 |
0.37 |
0.33 |
0.42 |
| E | 6.37 |
6.32 |
6.32 |
6.38 |
6.35 |
6.31 |
| EW | 55 |
64 |
114 |
89 |
113 |
104 |
| Norm | 126 |
125 |
79 |
118 |
73 |
103 |
| χ2/d.o.f. | 675/641 | 588/632 | 834/809 | 840/811 | 780/808 | 652/690 |
| CFPMA/FPMB | 1.02 |
1.05 |
1.02 |
1.05 |
1.02 |
1.05 |
| Model III : const*TBabs*zTBabs(xillver) | ||||||
| Γ | 1.75 |
1.78 |
1.68 |
1.77 |
1.66 |
1.81 |
| NH(zTBabs) | 6.47 |
4.83 |
7.13 |
4.52 |
8.16 |
4.25 |
| Ecut | > 487 | > 480 | 129 |
179 |
133 |
> 395 |
| R | 0.25 |
0.36 |
0.49 |
0.49 |
0.51 |
0.54 |
| Norm | 4.35 |
3.61 |
2.20 |
2.47 |
2.07 |
2.70 |
| χ2/d.o.f. | 677/643 | 595/634 | 851/811 | 849/813 | 792/810 | 666/692 |
| CFPMA/FPMB | 1.02 |
1.05 |
1.02 |
1.05 |
1.02 |
1.05 |
| Model IV : const*TBabs*zTBabs(xillverCP) | ||||||
| Γ | 1.77 |
1.80 |
1.79 |
1.85 |
1.77 |
1.84 |
| NH(zTBabs) | 6.47 |
4.63 |
8.72 |
5.66 |
9.79 |
4.30 |
| kTe | > 53 | > 54 | 39 |
65 |
38 |
> 65 |
| R | 0.25 |
0.35 |
0.43 |
0.46 |
0.45 |
0.55 |
| Norm | 3.46 |
2.95 |
2.23 |
2.46 |
2.07 |
2.34 |
| χ2/d.o.f. | 677/643 | 595/634 | 855/811 | 852/813 | 795/810 | 667/692 |
| CFPMA/FPMB | 1.02 |
1.05 |
1.02 |
1.05 |
1.02 |
1.05 |
| Flux | 1.23 |
1.11 |
1.02 |
1.05 |
0.96 |
0.92 |
Notes. Models are Model I: const*TBabs*zTBabs(zpo + zgauss), Model II: const*TBabs*zTBabs(pexrav + zgauss), Model III: const*TBabs*zTBabs(xillver), and Model IV: const*TBabs*zTBabs(xillverCP). The width of the FeKα line was frozen to the value of 0.1 keV during the fitting. The fluxes are in units of 10−10 erg cm−2 s−1 in the 4–60 keV band except in epoch F, where the flux was derived in the 4–55 keV band. Columns and parameters have the same meaning as given for Table 2.
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