Table 4
Best fits to the 0.8–1.8 keV RGS and 1.7–10 keV EPIC pn persistent spectra for all observations using the tbabs*cabs*warmabs* (diskbb+bbrad+gau) model.
| Observation No. | 4 | 6 | 7 | 8 | 9 | |
|
|
||||||
| Comp. | ||||||
| Parameter | ||||||
| dbb | ||||||
| kTdbb (keV) | 0.86  |
1.16  |
1.15  |
1.80 |
0.77  |
|
| kdbb [(Rin/D10)2 cos θ] | 492  |
226  |
201  |
38 ± 8 | 622  |
|
| bb | ||||||
| kTbb (keV) | 1.24 ± 0.02 | 1.66 |
1.60  |
1.21 |
1.28 ± 0.01 | |
| kbb [(Rin/D10)2] | 310  |
74  |
81  |
113 |
272  |
|
| gau1 | ||||||
| Egau (keV) | 6.56  |
6.71  |
6.63 ± 0.11 | 6.59  |
6.69 ± 0.06 | |
| σ (keV) | 0.88  |
0.77 |
0.72  |
0.78  |
0.77  |
|
| kgau (10-4 ph cm-2 s-1) | 0.023 ± 0.006 | 0.008  |
0.007  |
0.014  |
0.017 ± 0.003 | |
| EW (eV) | 299 ± 77 | 91  |
88  |
195  |
235 ± 42 | |
| tbabs | ||||||
 (1022 cm-2) |
2.86 ± 0.05 | 2.86 ± 0.02 | 2.92 ± 0.02 | 2.77 ± 0.05 | 2.87 |
|
| warmabs | ||||||
 (1022 cm-2) |
17.2  |
6.6  |
6.6  |
6.0 |
7.1 |
|
| log (ξ) (erg cm s-1) | 4.41  |
4.39 ± 0.17 | 4.34  |
3.97  |
4.23 ± 0.10 | |
| σv (km s-1) | 580  |
3390  |
2130  |
480  |
975  |
|
| v (km s-1) | –2310  |
–3690  |
–2160  |
–2130 ± 480 | –2400 ± 360 | |
|
|
||||||
 (d.o.f.) |
1.11 (586) | 1.12 (701) | 1.04 (686) | 1.09 (548) | 1.23 (575) | |
|
|
||||||
 (10-09 erg cm-2 s-1) |
9.6 | 9.5 | 8.7 | 8.0 | 8.3 | |
 (10-11 erg cm-2 s-1) |
24.3 | 7.9 | 7.1 | 14.7 | 17.6 | |
| Exposure (ks) | 5.2 | 8.9 | 13.5 | 6.5 | 6.7 | |
Notes. The column density of the cabs component was tied to the column density of the photo-ionised absorber (see text). kbb, kdbb and kgau are the normalisations of the blackbody component, disc blackbody and Gaussian emission feature, respectively. kTbb and kTdbb are the temperatures of the blackbody and disc blackbody, respectively. Egau and σ represent the energy and width of the Gaussian feature. and are the column densities for the neutral and ionised absorbers, respectively. ξ, σv, and v are the ionisation parameter (in units of erg cm s-1), the turbulent velocity broadening, and the average systematic velocity shift of the absorber (negative values indicate blueshifts). Ftot is the unabsorbed total flux, and Fgau is the unabsorbed emission Gaussian flux. The width (σ) of the Gaussian emission line gau was constrained to be ≤ 1 keV in the fits.
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