Table 5
RGS best-fit parameters to the two flux-resolved spectra.
| Component | Parameter | Low-flux dip spectrum | High-flux non-dip spectrum |
|---|---|---|---|
| Blackbody | Area (1018 cm2) | 4.5 ± 0.4 | 4.9 ± 0.2 |
| Radius (km) | 10 800 ± 1700 | 11 200 ± 1360 | |
| kT (eV/105 K) | 62 ± 1/7.2 ± 0.1 | 90 ± 1/10.4 ± 0.1 | |
| LX (1036 erg s−1) | 19 ± 6 | 178 ± 16 | |
| Lbol (1036 erg s−1) | 74 | 320 | |
| CIE 1 | ne nHV (1058 cm−3) | 1.12 ± 0.05 | All fixed |
| kT (eV/105 K) | 1320 ± 50/153 ± 6 | ||
| LX (1036 erg s−1) | 0.496 ± 0.023 | ||
| Lbol (1036 erg s−1) | 0.68 | ||
| σV (km s−1) | 890 ± 90 | ||
| N/H | 11 ± 3 | ||
| CIE 2 | ne nHV (1058 cm−3) | 3.7 ± 0.9 | All fixed |
| kT (eV/105 K) | 180 ± 50/20.9 ± 6 | ||
| LX (1036 erg s−1) | 2.33 ± 0.58 | ||
| Lbol (1036 erg s−1) | 6.2 | ||
| σV (km s−1) | 890 (coupled) | ||
| N/H | 11 (coupled) | ||
| PION | NH (1021 cm−2) | ≲ 0.6 | 18 ± 3 |
| Log ξ (erg s−1 cm) | ≡ 2.29 | 2.29 ± 0.05 | |
| σV (km s−1) | ≡ 350 | 350 ± 5 | |
| ΔV (km s−1) | ≡−900 | − 900 ± 10 | |
| N/H | ≡ 60 | 60 ± 20 | |
| O/N | ≡ 0.7 | 0.7 ± 0.1 | |
| C/N | ≡ 0.11 | 0.11 ± 0.01 | |
| Cold gas | NH (1021 cm−2) | 4.2 ± 0.1 | 4.3 ± 0.1 |
| O/H | ≡ 1 | 1.1 ± 0.1 | |
| Dust | O I (1017 cm−2) | ≲ 5 | 8.1 ± 0.4 |
| Statistics | χ2/d.o.f. | 2603/1685 = 1.5 | 10 070/1716 = 5.9 |
Notes. Uncertainties are given at a 1σ (68.3%) level. The CIE parameters are only fitted for the emission-line-dominated, low-flux dip spectrum. The X-ray luminosities (LX) are computed between 0.3 and 10 keV (assuming a distance of 9 kpc, Lbol from 0.01–100 keV (Lbol are extrapolated and, therefore, provided without error bars). σV and ΔV refer to the velocity dispersion and the line-of-sight velocity (Doppler shift), respectively. PION photoionised absorption and dust (AMOL) absorption model parameters are also reported for the low-flux spectrum for completeness, but the low continuum prevents us from obtaining a significant detection.
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