Table 7.
Model A parameters for V404 Cyg epochs.
| Model A: C1 × PHABS × SMEDGE × PCFABS × (RELXILLCP + XILLVERCP + GAUSS) | ||||||
|---|---|---|---|---|---|---|
| Epoch 1 | Epoch 2 | Epoch 3 | Epoch 4 | Epoch 5 | ||
| PHABS × SMEDGE × PCFABS | ||||||
| NH, 1 | 1022 cm−2 | 2.8 |
1.8 |
2.7 ± 0.3 | 0.83–0.93 | 2.7 ± 0.1 |
| E | keV | 7.41 ± 0.07 | 7.45 |
– | – | – |
| τ | 0.32 |
0.36 ± 0.04 | – | – | – | |
| σ | keV | 1 | 1 | – | – | – |
| NH, 2 | 1022 cm−2 | 39 ± 2 | 35 ± 2 | – | – | – |
| fcov | 0.82 ± 0.01 | 0.75 ± 0.01 | – | – | – | |
| RELXILLCP | ||||||
| Norm | ×10−3 | 27 ± 2 | 47 |
15 ± 1 | 14.1 ± 0.7 | 15.3 |
| θinc | deg | 22 |
>78 | 32 ± 1 | 35 ± 1 | 37.1 ± 0.4 |
| Rin | RISCO | 5 |
20 |
< 1.1 | < 1.2 | < 1.1 |
| z | < 0.013 | 0.031 ± 0.004 | 0.011 ± 0.002 | 0.013 |
0.019 ± 0.002 | |
| Γ | 1.85 ± 0.01 | 2.05 ± 0.02 | 1.58 |
1.35 ± 0.01 | 1.80 ± 0.01 | |
| log ξ | 3.43 |
3.6 ± 0.1 | 2.86 |
3.09 ± 0.01 | 2.86 |
|
| AFe | 1.7 |
1.8 ± 0.3 | 0.75 |
1.66 ± 0.08 | 0.91 ± 0.01 | |
| kTe | keV | 3.9 ± 0.2 | 2.5 ± 0.1 | 50 |
17.5 ± 0.2 | 90 |
| XILLVERCP | ||||||
| log ξ | – | – | < 1.7 | 2.35 ± 0.02 | 1.7 |
|
| Norm | ×10−3 | – | – | 26 ± 3 | 44 ± 2 | 14 |
| GAUSS | ||||||
| E | keV | 6.52 |
6.48 |
– | – | – |
| Norm | ×10−3 | −11 ± 2 | −8 ± 2 | – | – | – |
| Constants (a) | ||||||
| C1 | 1.00 | 0.99 | 1.01 | 1.00 | 1.00 | |
| Fluxes (10−8 erg s−1 cm−2) | ||||||
| Abs. | 1.25 ± 0.06 | 1.35 ± 0.07 | 4.2 ± 0.1 | 6.8 ± 0.1 | 2.8 ± 0.1 | |
| Unabs. | 2.5 ± 0.1 | 2.9 ± 0.1 | 4.2 ± 0.1 | 6.8 ± 0.1 | 2.9 ± 0.1 | |
| RELXILL | 100% | 100% | 61% | 45% | 78% | |
| XILLVER | – | – | 39% | 55% | 22% | |
| Luminosities (b) and Eddington ratio (c) (3–79 keV) | ||||||
| Abs. | 1038 erg s−1 | 0.09 ± 0.02 | 0.09 ± 0.03 | 0.29 ± 0.05 | 0.46 ± 0.07 | 0.19 ± 0.03 |
| Unabs. | 1038 erg s−1 | 0.17 ± 0.03 | 0.20 ± 0.03 | 0.29 ± 0.05 | 0.46 ± 0.07 | 0.20 ± 0.03 |
| L/LEdd | 0.015 |
0.017 |
0.025 |
0.041 |
0.017 |
|
| Both NuSTAR detectors: | (A/B) | (A/B) | (A/B) | (A/B) | (A/B) | |
| χ2/d.o.f. | 872/617 | 716/510 | 441/378 | 1088/827 | 952/747 | |
 |
1.41 | 1.40 | 1.17 | 1.32 | 1.27 | |
| Single NuSTAR detector: | (A) | (B) | (A) | (B) | (B) | |
| χ2/d.o.f. | 335/306 | 292/244 | 207/189 | 460/400 | 454/362 | |
 |
1.10 | 1.20 | 1.10 | 1.15 | 1.25 | |
Notes. Parameters without errors are kept frozen at the value shown. The dash marks components that are not part of the spectral model in a particular data set.
The following distance estimates have been used: 2.39 ± 0.14 kpc (Miller-Jones et al. 2009).
The following mass estimates have been used: 9.0
M⊙ (Khargharia et al. 2010).
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