Table 3
Results of the fitting of MXB 1728–34 XMM-Newton data with different models.
| Model 1: | Model 2: | Model 3: | Model 4: | Model 5: | ||
| Component | Parameter | Gaussian | Diskline | Relline | Two edges | Reflection |
|
|
||||||
| edge | E edge (keV) | − | − | − | 7.5 ± 0.1 | − |
| edge | τ (× 10-2) | − | − | − | 6 ± 1 | − |
| edge | E edge (keV) | − | − | − |
|
− |
| edge | τ (× 10-2) | − | − | − | 6 ± 1 | − |
| phabs | NH (× 1022 cm-2) | 2.2 ± 0.1 | 2.2 ± 0.1 | 2.2 ± 0.1 | 2.4 ± 0.1 | 2.7 ± 0.1 |
| compTT | kTseed (keV) | 0.69 ± 0.02 |
|
0.68 ± 0.02 | 0.62 ± 0.02 | − |
| compTT | kTe (keV) | 3.2 ± 0.1 | 3.3 ± 0.1 | 3.3 ± 0.1 | 3.1 ± 0.1 | − |
| compTT | τ |
|
|
|
15.2 ± 0.3 | − |
| compTT | Norm (× 10-2) | 7.6 ± 0.3 | 7.4 ± 0.3 |
|
8.3 ± 0.3 | − |
| nthComp | Γ | − | − | − | − |
|
| nthComp | kTe (keV) | − | − | − | − |
|
| nthComp | kTbb (keV) | − | − | − | − |
|
| nthComp | Norm (× 10-2) | − | − | − | − | 4.9 ± 0.2 |
| Gauss | E (keV) | 6.57 ± 0.05 | − | − | − | - |
| Gauss | σ (keV) | 0.6 (frozen) | − | − | − | - |
| Gauss | Norm (× 10-4) | 8.8 ± 1 | − | − | − | - |
| diskline | E (keV) | − |
|
− | − | - |
| diskline | Betor | − |
|
- | − | − |
| diskline | Rin (GM/c2) | − |
|
− | − | - |
| diskline | Rout (GM/c2) | − | 1000 (frozen) | − | − | - |
| diskline | i (°) | − | 60 (frozen) | − | − | − |
| diskline | Norm (× 10-4) | − | 9.6 ± 1 | − | − | − |
| relline | E (keV) | − | − | 6.43 ± 0.07 | − | − |
| relline | Index 1 | − | − |
|
− | − |
| relline | i (°) | − | − | 60 (frozen) | − | − |
| relline | Rin (GM/c2) | − | − |
|
− | − |
| relline | Rout (GM/c2) | − | − | 1000 (frozen) | − | − |
| rdblur | Betor | − | − | − | − | –2.8 (frozen) |
| rdblur | Rin (GM/c2) | − | − | − | − |
|
| rdblur | Rout (GM/c2) | − | − | − | − | 1000 (frozen) |
| rdblur | i (°) | − | − | − | − | > 44 |
| reflion | Fe/Solar | − | − | − | − | 1 (frozen) |
| reflion | Γ | − | − | − | − |
|
| reflion | ξ | − | − | − | − | 660 (frozen) |
| reflion | Norm (× 10-6) | − | − | − | − |
|
| Total χ2 (d.o.f.) | 1489 (901) | 1463 (899) | 1464 (899) | 1519 (899) | 1463 (900) | |
Notes. The five models reported in this table mainly differ in the modeling of the iron feature. In the first four models the X-ray continuum is fitted with const*phabs*CompTT, to which a Gaussian line (Model 1), or a diskline (Model 2), or a relativistic line (Model 3) or two edges (Model 4) are used to fit residuals in the iron K-shell range. Model 5 includes a different Comptonization continuum model and a self-consistent, relativistically smeared reflection component: const*phabs*(nthComp + rdblur * reflionx).
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