Table 2
Averaged spectrum. Emission lines of X1822-371.
| Identification | Expected | E | σ | I | Eq. width | Significance | |
| (keV) | (keV) | (eV) | (10-4 ph cm-2 s-1) | (eV) | (σ) | ||
|
|
|||||||
| HETGS | O vii (i) | 0.5687 | 0.5684 ± 0.0003 | 1.1 ± 0.2 | 34 ± 6 | 19 ± 6 | 6 |
| O viii | 0.6536 |
|
1.1 ± 0.3 | 9 ± 2 | 6 ± 2 | 5 | |
| Ne ix (i) | 0.9149 | 0.9147 ± 0.0003 | 1.7 ± 0.3 | 4.3 ± 0.5 | 5.2 ± 1.0 | 9 | |
| Ne x | 1.0218 | 1.0212 ± 0.0003 |
|
2.4 ± 0.3 | 3.4 ± 0.8 | 8 | |
| Mg xi (i) | 1.3433 | 1.3430 ± 0.0004 | 2.8 ± 0.5 | 1.40 ± 0.14 | 2.8 ± 0.6 | 10 | |
| Mg xii | 1.4723 | 1.4706 ± 0.0005 | 2.5 ± 0.4 | 0.82 ± 0.10 | 1.9 ± 0.6 | 8 | |
| Si xiii (i) | 1.8542 | 1.8551 ± 0.0010 | 3 (fixed) | 0.46 ± 0.08 | 1.4 ± 0.6 | 6 | |
| Si xiv | 2.005 | 2.0043 ± 0.0007 | 3.7 ± 0.6 | 0.74 ± 0.09 | 2.5 ± 0.7 | 8 | |
| Fe i | 6.404 | 6.393 ± 0.002 | 18 ± 3 | 3.2 ± 0.2 | 40 ± 6 | 16 | |
| Fe xxv(i) | 6.675 | 6.675 (fixed) | 13 (fixed) | 0.6 ± 0.2 | 8 ± 4 | 3 | |
| Fe xxvi | 6.966 | 6.952 ± 0.004 | 13 ± 6 | 1.5 ± 0.2 | 22 ± 8 | 8 | |
| RGS | O vii (i) | 0.5687 |
|
1.4 ± 0.2 | 23.2 ± 1.3 | 22 ± 2 | 18 |
| O viii | 0.6536 |
|
<0.7 | 3.6 ± 0.4 | 4.6 ± 1.0 | 9 | |
| Ne ix (i) | 0.9149 | 0.9139 ± 0.0011 | 4.4 ± 1.3 | 3.8 ± 0.3 | 8.0 ± 1.3 | 13 | |
| Ne x | 1.0218 | 1.0218 (fixed) | 2 (fixed) | 1.3 ± 0.2 | 3.2 ± 1.1 | 7 | |
| Mg xi (i) | 1.3433 | 1.3433 (fixed) | 3 (fixed) | 0.6 ± 0.2 | 2.0 ± 1.1 | 3 | |
| Epic-pn | Si xiv | 2.005 |
|
4 (fixed) | 1.49 ± 0.15 | 8 ± 2 | 10 |
| Fe i | 6.404 | 6.402 ± 0.004 | 75 ± 8 | 3.24 ± 0.13 | 56 ± 5 | 25 | |
| Fe xxv (i) | 6.675 | 6.703 ± 0.013 | 20 (fixed) | 0.70 ± 0.08 | 12 ± 3 | 9 | |
| Fe xxvi | 6.966 | 6.991 ± 0.009 |
|
|
26 ± 5 | 23 | |
Notes. Best-fit values of the HETGS and XMM emission lines in X1822-371. Uncertainties are at the 68% c.l. for each parameter. In the first column we report the atomic transition, from the second to the fifth column the expected rest-frame energy, the centroid, the width, and the intensity of each line. In the sixth and seventh column we report the equivalent width and the significances, in units of σ, of each line.
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