Table 8.
Model B parameters for V404 Cyg epochs.
| Model B: C1 × PHABS1 × SMEDGE × (C2 × BORUS02(RED) + C3 × BORUS02(BLUE) + PHABS2 × CABS × CUTOFFPL | ||||||
|---|---|---|---|---|---|---|
| + C4 × CUTOFFPL + PCFABS × BBODY) | ||||||
| Epoch 1 | Epoch 2 | Epoch 3 | Epoch 4 | Epoch 5 | ||
| PHABS1 × SMEDGE | ||||||
| NH, ism | 1022 cm−2 | 0.83 | 0.83 | 0.83 | 0.83 | 0.83 |
| E | keV | 8.67 ± 0.05 | 8.62 ± 0.04 | – | – | 8.5 ± 0.1 |
| τ | 0.30 ± 0.02 | 0.36 |
– | – | 0.16 ± 0.01 | |
| σ | keV | 0.5 | 0.5 | – | – | 0.5 |
| BORUS02 | ||||||
| log NH, tor | 24.21 |
24.00 |
24.58 ± 0.02 | 24.703 ± 0.006 | 24.66 ± 0.01 | |
| cos(θtor) | >0.78 | >0.57 | 0.55 ± 0.01 | 0.55 ± 0.01 | 0.56 ± 0.01 | |
| cos(θinc) | 0.39 | 0.39 | 0.39 | 0.39 | 0.39 | |
| z | 0.042 |
0.056 |
0.014 |
0.014 ± 0.001 | 0.022 ± 0.002 | |
| PHABS2 × CABS × CUTOFFPL | ||||||
| log NH, los | 24.36 |
24.24 |
23.53 |
23.58 |
23.57 ± 0.01 | |
| Norm | 262 |
92 |
3.2 ± 0.5 | 6.1 |
14.2 |
|
| Γ | 2.6 | 2.6 | 1.92 ± 0.05 | 2.05 |
2.50 ± 0.02 | |
| Ecut | keV | 21.8 |
26.4 |
94 |
62 |
>474 |
| PCFABS × BBODY | ||||||
| log NH, bb | 23.782 |
23.73 ± 0.01 | – | – | – | |
| Cov | 0.821 |
0.76 |
– | – | – | |
| Norm | 0.32 ± 0.01 | 0.44 |
– | – | – | |
| kT | keV | 1.120 ± 0.005 | 0.95 ± 0.01 | – | – | – |
| Constants (a) | ||||||
| C1 | 1.00 | 0.99 | 1.01 | 1.00 | 1.00 | |
| C2 | 0.11 |
0.07 |
7.7 ± 0.7 | 15.7 ± 0.8 | 7.3 ± 0.4 | |
| C3 | 0.05 |
0.10 |
2.2 |
8.1 ± 0.6 | 3.7 ± 0.4 | |
| C4 | 0 | 0.034 |
0.24 |
0.22 ± 0.02 | 0.185 |
|
| Fluxes (10−8 erg s−1 cm−2) | ||||||
| Abs. | 1.4 ± 0.3 | 1.36 ± 0.07 | 4.2 ± 0.5 | 7.0 ± 0.6 | 2.8 ± 0.1 | |
| Unabs. | 23 ± 6 | 9.8 ± 0.7 | 5.0 ± 0.5 | 8.1 ± 0.5 | 4.0 ± 0.1 | |
| LOS | 90% | 74% | 33% | 25% | 50% | |
| Scattered | 2% | 2% | 59% | 70% | 40% | |
| Leaked | – | 2% | 8% | 5% | 10% | |
| BB | 8% | 22% | – | – | – | |
| Luminosities (b) and Eddington ratio (c) (3–79 keV) | ||||||
| Abs. | 1038 erg s−1 | 0.09 ± 0.03 | 0.09 ± 0.02 | 0.29 ± 0.08 | 0.48 ± 0.10 | 0.19 ± 0.03 |
| Unabs. | 1038 erg s−1 | 1.6 ± 0.2 | 0.67 ± 0.13 | 0.34 ± 0.08 | 0.55 ± 0.10 | 0.28 ± 0.04 |
| L/LEdd | 0.14 |
0.06 |
0.03 ± 0.01 | 0.05 ± 0.01 | 0.02 ± 0.01 | |
| Both NuSTAR detectors: | (A/B) | (A/B) | (A/B) | (A/B) | (A/B) | |
| χ2/d.o.f. | 877/619 | 758/510 | 451/379 | 1143/828 | 945/746 | |
 |
1.42 | 1.49 | 1.19 | 1.38 | 1.27 | |
| Single NuSTAR detector: | (A) | (B) | (A) | (B) | (B) | |
| χ2/d.o.f. | 392/308 | 297/244 | 207/189 | 504/401 | 448/362 | |
 |
1.27 | 1.22 | 1.10 | 1.26 | 1.24 | |
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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