Table A.1.
Summary of the best-fit parameters of each model tested for the Chandra stacked spectra.
| Model | Image | Γ | NH | CF | Eel | σel | Eal | σal |  |
|---|---|---|---|---|---|---|---|---|---|
| pl | A | 1.67 ± 0.03 | – | – | – | – | – | – | 2.20 (260) |
| pl | B | 1.64 ± 0.03 | – | – | – | – | – | – | 1.58 (166) |
| pl | C | 1.64 ± 0.03 | – | – | – | – | – | – | 1.40 (138) |
| pl | D | 1.62 ± 0.03 | – | – | – | – | – | – | 1.39 (153) |
| pl_pca | A | 2.07 ± 0.06 |
 |
0.59 ± 0.04 | – | – | – | – | 1.42 (258) |
| pl_pca | B | 1.96 ± 0.10 |
 |
0.55 ± 0.08 | – | – | – | – | 1.29 (164) |
| pl_pca | C | 1.98 ± 0.14 |
 |
0.51 ± 0.11 | – | – | – | – | 1.22 (136) |
| pl_pca | D | 1.89 ± 0.10 |
 |
0.53 ± 0.12 | – | – | – | – | 1.16 (151) |
| pl_pca_el | A | 2.05 ± 0.06 |
 |
0.58 ± 0.04 | 6.49 ± 0.08 | <0.01 | – | – | 1.28 (256) |
| pl_pca_el | B | 1.95 ± 0.10 |
 |
0.55 ± 0.08 |
 |
<0.01 | – | – | 1.20 (162) |
| pl_pca_el (1) | C | 1.91 ± 0.14 |
 |
 |
5.56 ± 0.08 | <0.01 | – | – | 1.12 (134) |
| pl_pca_el (2) | C | 1.95 ± 0.14 |
 |
 |
 |
<0.01 | – | – | 1.19 (134) |
| pl_pca_el | D | 1.89 ± 0.10 |
 |
 |
 |
<0.01 | – | – | 1.07 (149) |
| pl_pca_bel | A | 2.05 ± 0.06 | 3.93 ± 0.84 | 0.58 ± 0.04 | 6.45 ± 0.08 | 0.16 ± 0.08 | – | – | 1.27 (255) |
| pl_pca_bel | B | 1.92 ± 0.10 |
 |
 |
 |
 |
– | – | 1.17 (161) |
| pl_pca_bel | C | 1.85 ± 0.13 |
 |
0.42−0.16 | 5.94 ± 0.23 |
 |
– | – | 1.09 (133) |
| pl_pca_bel | D | 1.88 ± 0.10 |
 |
0.54−0.13 | 6.28 ± 0.20 |
 |
– | – | 1.00 (148) |
| pl_pca_el_al | A | 2.05 ± 0.06 | 4.18 ± 0.85 | 0.58 ± 0.04 | 6.49 ± 0.08 | <0.01 |
 |
<0.01 | 1.27 (254) |
| pl_pca_el_al | B | 1.94 ± 0.10 |
 |
0.54 ± 0.09 |
 |
<0.01 |
 |
<0.01 | 1.17 (160) |
| pl_pca_el_al | C | 1.91 ± 0.14 |
 |
 |
5.57 ± 0.08 | <0.01 |
 |
<0.01 | 1.12 (132) |
| pl_pca_el_al | D | 1.87 ± 0.10 |
 |
 |
 |
<0.01 | 7.41 ± 0.17 | <0.01 | 1.04 (147) |
| pl_pca_el | A+B+D | 1.99 ± 0.05 | 3.65 ± 0.69 | 0.54 ± 0.04 | 6.50 ± 0.06 | > 0.01 | – | – | 1.27 (305) |
| pl_pca_bel | A+B+D | 1.98 ± 0.05 | 3.36 ± 0.70 | 0.54 ± 0.04 |
 |
 |
– | – | 1.21 (304) |
| pl | A+B+C+D | 1.66 ± 0.02 | – | – | – | – | – | – | 2.48 (319) |
| pl_pca | A+B+C+D | 2.00 ± 0.04 |
 |
0.55 ± 0.03 | – | – | – | – | 1.53 (317) |
| pl_pca_el | A+B+C+D | 1.99 ± 0.04 | 3.48 ± 0.68 | 0.52 ± 0.04 | 6.49 ± 0.07 | <0.01 | – | – | 1.32 (315) |
| pl_pca_el_al | A+B+C+D | 1.98 ± 0.04 | 3.92 ± 0.69 | 0.53 ± 0.04 | 6.49 ± 0.07 | <0.01 | 7.43 ± 0.09 | <0.01 | 1.27 (313) |
| pl_pca_bel | A+B+C+D | 1.95 ± 0.04 | 2.92 ± 0.70 | 0.51 ± 0.04 | 6.09 ± 0.14 | 0.52 ± 0.11 | – | – | 1.23 (314) |
| pl_pca_bel_al | A+B+C+D | 1.94 ± 0.05 | 2.86 ± 0.73 | 0.50 ± 0.04 | 6.13 ± 0.14 |
 |
7.36 ± 0.11 | <0.01 | 1.17 (312) |
| pl_pca_bel_bal | A+B+C+D | 1.93 ± 0.05 | 2.84 ± 0.75 | 0.50 ± 0.04 |
 |
0.73 ± 0.16 | 7.28 ± 0.10 |
 |
1.15 (311) |
| pl_pca_bel_el_al | A+B+C+D | 1.96 ± 0.04 | 3.26 ± 0.68 | 0.52 ± 0.04 | 6.44 ± 0.07 | 0.22 ± 0.07 | 7.42 ± 0.10 | <0.01 | 1.14 (310) |
| 5.62 ± 0.09 | <0.01 | ||||||||
Notes. Column 1: model name; Col. 2: combined images; Col. 3: photon index; Col. 4: column density in excess of the Galactic value (units of 1022 cm−2); Col. 5: covering fraction of the extra absorption; Col. 6: energy of the emission line (in units of keV); Col. 7: width of the emission line (in units of keV); Col. 8: energy of the absorption line (in units of keV); Col. 9: width of the absorption line (in units of keV); Col. 10: reduced χ2 (degrees of freedom). All the errors are evaluated at 90% confidence. Model list: Model pl=phabs*zpo; Model pl_pca=phabs*zpcf*zpo; Model pl_pca_el=phabs*zpcf*(zpo+zgauss); Model pl_pca_el_al=phabs*zpcf*(zpo+zgauss+zgauss). When the width of the emission and absorption line is a free parameter of the model, it is reported as a bel/bal component in its name.
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