Table 1.
Results of spectral fitting of the coronal model reflkerr using empirical radial emissivities.
| Model: reflkerr | ||||
|---|---|---|---|---|
| VL | L | M | H | |
| q1 |  |
8.9 |
8.4 |
6.6 |
| q2 |  |
0.0 |
0.1 |
1.4 |
| q3 | – | 3.0 |
4.0 |
4.0 |
| rbr, 1 |  |
4.5 |
5.0 |
4.7 |
| rbr, 2 | – | 18.5 |
28.2 |
32.0 |
| Γ |  |
3.20 |
3.10 |
3.00 |
| ξ |  |
53.44(f) | 53.44(f) | 53.44(f) |
| ℛ | >750 |  |
 |
11.4 |
| χ2/DoF | ||||
| (1) | 119/86 | 290/132 | 293/141 | 347/140 |
| (2) | 173/127 | 836/688 | 1089/932 | 1123/950 |
Notes. The model fitted to L, M, and H assumes a twice-broken power-law, radial emissivity profile and ξ = 53.44. The model fitted to VL assumes a once-broken power-law profile; ξ is free. In all models i = 53.96°, and ZFe = 8.88, a = 0.998, rin = rISCO and rout = 1000. The χ2/DoF values correspond to spectral binning (1) and (2); see Sect. 2. The best-fit values and parameter uncertainties given in the table correspond to binning (1); the differences in the best-fit values obtained with binning (2) are insignificant.
Quantity (f) denotes a fixed parameter. Following W14, for L, M, and H the fitted ranges of q1, q2, q3, rbr, 1, and rbr, 2 are constrained to [5, 10], [0, 2], [2, 4], [3, 5], and [5, 35], respectively. The uncertainties are given for 90% confidence level. The uncertainties given as “+0” or “−0” correspond to the limit of the considered range of a parameter. The quantity ξ is given in units of erg cm s−1.
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