Table 2
IGR J17329-2731 broadband spectral analysis results.
| Parameter | Model 1 | Model 2 | Model 3 |
|---|---|---|---|
| NH1 (1022 cm−2) | 0.3 (fixed) | 48.9 |
0.3 (fixed) |
(38.8 ) |
|||
| NH2 (1022 cm−2) | 47.4 ± 0.3 | – | 48.4 ± 0.5 |
| f | 0.9965 ± 0.0005 | – | 0.9946 ± 0.0006 |
| (0.892 ± 0.005) | – | (0.902 ) |
|
| kTBB (keV) | – | 0.28 |
1.41 |
| RBB (km) | – | 62 |
0.35 ± 0.05 |
(133 ) |
(0.38 ± 0.03) | ||
| Ecycl1 (keV) | 20.9 ± 0.2 | 21.1 ± 0.2 | 21.6 ± 0.2 |
| σcycl1 (keV) | 4.0 (fixed) | 4.0 (fixed) | 4.6 ± 0.2 |
| τcycl1 | 3.6 ± 0.2 | 3.7 ± 0.7 | 4.4 |
| Ecycl2 (keV) | 31.6 |
32.3 ± 0.9 | 37.7 |
| σcycl2 (keV) | 7.0 (fixed) | 7.0 (fixed) | 7.0 (fixed) |
| τcycl2 | 9.1 ± 0.5 | 9.0 ± 0.5 | 3.8 |
| Ecycl3 (keV) | 44.0 ± 1.2 | 44.4 ± 1.2 | – |
| σcycl3 (keV) | 4.0 (fixed) | 4.0 (fixed) | – |
| τcycl3 | 4.3 |
4.2 |
– |
| EFe Kα (keV) | 6.444 ± 0.005 | 6.450 ± 0.002 | 6.450 |
| EqwFe Kα (keV) | 0.19 ± 0.01 | 0.19 ± 0.01 | 0.19 ± 0.05 |
| (0.15 ± 0.03) | (0.15 ± 0.02) | (0.14 ± 0.04) | |
| EFe Kβ (keV) | 7.104 ± 0.008 | 7.104 ± 0.008 | 7.099 ± 0.005 |
| EqwFe Kβ (keV) | 0.049 |
0.049 |
0.052 |
| ES Kα (keV) | 2.33 ± 0.03 | 2.33 |
2.36 |
| EqwS Kα (keV) | 0.51 |
2.1 |
0.32 |
| Ecut (keV) | 5.8 ± 0.1 | 5.7 ± 0.1 | – |
| Efold (keV) | 14.5 ± 0.3 | 14.9 ± 0.2 | – |
| Γa | 0.58 |
0.60 |
– |
| kT (keV) | – | – | 120.6 |
| kTseed (keV) | – | – | 3.2 |
| τp | – | – | 0.030 |
| F0.5-10 keV | 6.38 |
6.38 |
6.38 |
| F3-79 keV | 34.5 |
34.5 |
35.3 |
 /d.o.f |
1.15/1031 | 1.17/1029 | 1.16/1030 |
Notes. Model 1 is CONST*TBABS*TBPCF*GABS*GABS*GABS* (GAUSS+GAUSS+GAUSS+HIGHECUT*POW), whereas model 2 is CONST*TBABS*GABS*GABS*GABS*(DISKBB+GAUSS+GAUSS+ GAUSS+HIGHECUT*POW). Model 3 corresponds to the case CONST*TBABS*TBPCF*GABS*GABS*(GAUSS+GAUSS+GAUSS+ BBODYRAD+COMPTT). The parameter NH1 is the Galactic absorption column density and NH2 the local absorption. The parameter f is the partial covering fraction. Parameters kTBB and RBB are the temperature and radius of the DISKBB/BBODYRAD component (the latter is given assuming a distance of 2.7 kpc and in the DISKBB case also considering a face-on disk). The parameter σ is the width of the cyclotron absorption features and τ their strength. The centroid energy and the equivalent width (Eqw) of all Gaussian emission line are reported. The parameter Γ is the photon index and Ecut, Efold the parameters of the high energy cutoff. Parameters kTseed, kT, and τp are the Comptt component. Fluxes are given in the 0.5–10 keV (measured from the XMM–Newton spectra) and in the 3-79 keV energy band (measured from the NuSTAR data) with units of 10−11 erg cm−2 s−1. Values in parentheses are those determined from the NuSTAR data and untied during the simultaneous fit with the XMM–Newton data.
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