Table 1
Spectral models and parameters.
| Spectrum and model | Parameters |
|
|
|
| Hard state a) refl(comptt+pow) |  C = 1.27η = 0.15kTe = 48.6 keV τ = 1.15Ncomp = 0.08Γ = 1.6Npow = 0.04 ph/(keV cm2 s) Fpow = 6.3 × 10-10 erg/(cm2 s) |
|
|
|
| Hard state b) refl(comptt+cutoffp) |  C = 1.27η = 0.18 ± 0.2kTe = 40.0 ± 2.1 keV τ = 1.49 ± 0.08Ncomp = 0.07Γ = 1.86 ± 0.2Ecut = 0.7 ± 0.3 MeV Ncutp = 0.7 ph/(keV cm2 s) Fpow = 9.7 × 10-10 erg/(cm2 s) |
|
|
|
| Hard state c) eqpair | C = 1.26η = 0.2 ± 0.1Γinj = 2.3 ± 0.6lbb = 21 ± 6lh/ls = 6.7 ± 0.6lnt/lh = 0.14 ± 0.08N = (4.0 ± 0.2) × 10-8 |
|
|
|
| Hard state fit from Rodriguez et al. (2015) | |
| d) refl (comptt+pow) | η = 0.13 ± 0.02kTe = 53 ± 2 keV τ = 1.15 ± 0.04 Fpow = 19 × 10-10 erg/(cm2 s) |
|
|
|
| Soft state e) eqpair |  C = 1.12η = 1 (fixed) Γinj = 3.4 ± 0.2lbb = 1.2 ± 1.0lh/ls = 0.31 ± 0.09lnt/lh = 0.8 ± 0.3N = (7 ± 1) × 10-7 |
|
|
|
Notes.The parameter η is the covering factor of the reflection and N are the normalisation of the various spectral components. The thermal comptonisation is characterised by the corona electron temperature kTe and optical depth τ. The eqpair model is characterised by the injected electron spectral slope Γ and by the soft, hard, non-thermal, and thermal compactness, the other parameters being fixed to values usually used for Cyg X-1. The parameter C is the PICsIT/ISGRI cross-calibration constant resulting from the fit, the cross-calibration factor of the Compton mode are fixed according to the events selection. The hard power-law flux is given in the range 0.4–1 MeV. The goodness of fit of the first model (limited by the absence of a high-energy cutoff) does not allow us to obtain reliable uncertainties. The results shown as model d) refer to the fit of the hard state spectrum obtained by Rodriguez et al. (2015), which could be compared to model a.
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