Table 2.
Parameters for the best-fit models for all the datasets.
| Mission/instrument | Date | Model | NH(a) | NH, WA | log(ξ′) | f | Γ | kT | Total flux (b) | χ2/d.o.f. |
|---|---|---|---|---|---|---|---|---|---|---|
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) |
| XMM-Newton/EPIC-pn | 2000 | PL | 0.060 ± 0.004 | – | – | – | 1.77 ± 0.02 | – | 5.70 | 259.1/139 (1.89) |
| WA*PL | 0.105 |
55 |
2.08 |
0.60 |
1.99 |
– | 8.69 | 144.9/136 (1.07) | ||
| PL+BB | 0.083 |
– | – | – | 1.67 ± 0.04 | 136 |
5.01 | 165.3/137 (1.21) | ||
| WA*(PL+BB) | 0.102 |
65 |
2.10 |
0.50 |
1.86 |
137 |
6.96 | 133.8/134 (0.99) | ||
| Suzaku/XIS | 2011 | PL | 0.207 ± 0.011 | – | – | – | 1.58 ± 0.02 | – | 2.59 | 271.2/180 (1.51) |
| XMM-Newton/EPIC-pn | 2017 | PL | 0.069 ± 0.002 | – | – | – | 1.84 ± 0.01 | – | 14.2/9.3 | 1113.8/464 (2.40) |
| + | WA*PL | 0.102 |
48 |
2.05 ± 0.04 | 0.47 |
2.03±0.02 | – | 19.6/9.5 | 683/461 (1.48) | |
| NuSTAR | PL+BB | 0.090 |
– | – | – | 1.77 ± 0.01 | 144 |
12.6/9.3 | 531.6/462 (1.15) | |
| WA*(PL+BB) | 0.101 ± 0.006 | 14 |
−2.18 |
0.19 |
1.86 |
130 |
14.7/9.3 | 494.2/459 (1.07) | ||
Notes. Table columns are as follows: (1) the mission and the instrument used, (2) the year of the observation, (3) the fitted model, (4) the foreground hydrogen column density NH in units of 1022 cm−2, (5) the column density of the warm absorber NH, WA in units of 1022 cm−2, (6) the ionization parameter of the warm absorber ξ′ in units of erg cm s−1, (7) the partial covering factor of the warm absorber f, (8) the power law photon index Γ, (9) the black body temperature in units of eV, (10) the total, unabsorbed flux for each instrument in units of 10−11 erg cm−2 s−1, and (11) the fit quality shown as the ratio of the chi-square value χ2 over the degrees of freedom (d.o.f.). The values in brackets represent the reduced chi-square value.
The Galactic value is NH = 5.39 × 1020 cm−2 (Kalberla et al. 2005).
Absorption-corrected fluxes estimated for the following ranges: 0.23−10 keV (2000) and 0.7−10 keV (2011). For the latter, the total flux is the average of the XIS cameras. For the 2017 spectrum, separate calculations were performed for the ranges: 0.23−10 keV(XMM)/3−50 keV(NuSTAR). The total flux of the 3−50 keV range is the average value of the two FPM detectors.
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