Table 2
Best fit parameters for a coronal model using a cutoff power-law and relativistic reflection.
| Model 1 | Obs1 | Obs2 | Obs3 | Obs4 | |
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| Apl |
|
|
|
1.56 ± 0.10 | |
| Γpl | 1.724 ± 0.012 |
|
|
|
|
| Efold [keV] | 181 ± 14 | 175 ± 13 |
|
|
|
|
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|||||
| Adisk |
|
(69 ± 7) × 102 |
|
|
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|
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| Aref [10-5] |
|
|
|
|
|
| Fe/Fe⊙ |
|
|
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|
| ϵ = 3 | ξ [erg cm s-1] |
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|
|
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|
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| ϵ | 3.0 | 3.0 | 3.0 | 3.0 | |
| a |
|
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|
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|
| i [deg] |
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|
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|
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| c HEXTE | 0.843 ± 0.006 | 0.826 ± 0.006 | 0.834 ± 0.004 | 0.826 ± 0.005 | |
| c PN |
|
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|
0.813 ± 0.004 | |
| c ISGRI |
|
0.921 ± 0.009 | 0.903 ± 0.008 | 0.905 ± 0.008 | |
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| s gainshift |
|
|
|
|
|
|
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| χ2/ d.o.f. | 574.0/393 | 418.7/320 | 582.1/443 | 406.1/332 | |
|
1.46 | 1.31 | 1.31 | 1.22 | |
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| Model 2 | A pl |
|
|
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|
| Γpl | 1.736 ± 0.013 |
|
|
|
|
| Efold [keV] |
|
181 ± 16 |
|
|
|
|
|
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| A disk |
|
|
(115 ± 8) × 102 |
|
|
|
|
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| Aref [10-5] |
|
1.6 ± 0.4 |
|
|
|
| Fe/Fe⊙ |
|
3.9 ± 0.9 |
|
|
|
| ϵ = free | ξ [erg cm s-1] |
|
|
|
|
|
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| ϵ |
|
|
|
|
|
| a | −0.59 ± 0.20 |
|
|
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|
| i [deg] |
|
|
|
|
|
|
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| c HEXTE |
|
0.825 ± 0.006 | 0.834 ± 0.004 | 0.827 ± 0.005 | |
| c PN |
|
0.780 ± 0.005 |
|
0.812 ± 0.004 | |
| c ISGRI | 0.924 ± 0.009 |
|
0.903 ± 0.008 | 0.906 ± 0.008 | |
|
|
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| s gainshift |
|
|
|
|
|
|
|
|||||
| χ2/ d.o.f. | 541.1/392 | 411.0/319 | 581.4/442 | 391.3/331 | |
|
|
1.38 | 1.29 | 1.32 | 1.18 | |
|
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| Model 3 | A pl | 1.88 ± 0.08 | 1.08 ± 0.10 |
|
|
| Γpl | 1.748 ± 0.014 |
|
|
|
|
| Efold [keV] |
|
170 ± 9 |
|
|
|
|
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| A disk | (163 ± 10) × 102 |
|
|
|
|
|
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| Aref [10-5] |
|
|
|
|
|
| Fe/Fe⊙ |
|
|
|
|
|
| ϵin = free | ξ [erg cm s-1] |
|
|
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|
|
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| ϵout = 3 | ϵ in |
|
|
|
|
| ϵ out | 3.0 | 3.0 | 3.0 | 3.0 | |
| r br [GM/c2] |
|
|
|
|
|
| a |
|
|
|
0.86 ± 0.05 | |
| i [deg] |
|
28 ± 4 |
|
|
|
|
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|||||
| c HEXTE | 0.844 ± 0.006 | 0.823 ± 0.007 | 0.834 ± 0.004 | 0.826 ± 0.005 | |
| c PN |
|
|
|
0.813 ± 0.004 | |
| c ISGRI | 0.923 ± 0.009 | 0.916 ± 0.010 | 0.903 ± 0.008 | 0.905 ± 0.008 | |
|
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| s gainshift |
|
|
|
|
|
|
|
|||||
| χ2/ d.o.f. | 544.6/386 | 394.6/318 | 574.3/441 | 397.7/330 | |
|
|
1.41 | 1.24 | 1.30 | 1.21 | |
Notes. Three situations are described (from the top to the bottom): 1) a single power-law emissivity profile with fixed emissivity index ϵ = 3; 2) power-law emissivity with ϵ free and free inclination i; 3) a broken power-law emissivity profile with ϵin free and ϵout = 3. Uncertainties are at the 90% confidence level for one parameter of interest.
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