Table 5.
Spectral parameters for the best-fit model obtained from the phase-averaged spectro-polarimetric analysis with XSPEC for observations 1, 2, and 3.
| Component | Parameter | Unit | Obs. 1 | Obs. 2 | Obs. 3 | Obs. 1–3 |
|---|---|---|---|---|---|---|
| tbabs | NH | 1022 cm−2 | 0.23 ± 0.07 | 0.31 ± 0.07 | 0.43 ± 0.09 | 0.31 ± 0.05 |
| powerlaw | Photon index | 1.00 ± 0.02 | 1.02 ± 0.02 | 1.02 ± 0.02 | 1.01 ± 0.01 | |
| polconst | PD | % | 3.2 ± 0.8 | 3.0 ± 0.9 | 5.5 ± 1.1 | 3.5 ± 0.5 |
| PA | deg | 97 ± 8 | 90 ± 8 | 80 ± 6 | 89 ± 4 | |
| constant | constDU2 | 1.019 ± 0.005 | 1.021 ± 0.005 | 1.026 ± 0.006 | 1.021 ± 0.003 | |
| constDU3 | 1.002 ± 0.005 | 1.000 ± 0.005 | 1.023 ± 0.006 | 1.001 ± 0.003 | ||
| Flux2 − 8 keV(a) | 10−10 erg s−1 cm−2 | 5.10 ± 0.07 | 4.92 ± 0.07 | 4.65 ± 0.07 | – | |
| L2 − 8 keV(b) | 1038 erg s−1 | 2.3 | 2.2 | 2.1 | – | |
| χ2 (d.o.f.) | 1332.1 (1259) | 1240.0 (1262) | 1256.9 (1214) | 3845.3 (3747) | ||
Notes. The uncertainties are given at the 68.3% (1σ) confidence level and were obtained using the error command in XSPEC with Δχ2 = 1 for one parameter of interest.
Luminosity is computed using the distance of d ∼ 61 kpc (the measured distance to the SMC is d = 60.6 ± 1.0 ± 2.8 kpc; Hilditch et al. 2005).
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