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Table 4

Spectral parameters obtained from the fit of the physical model in Sect. 4.2.1 to the averaged and dip EPIC-pn spectra of IGR J17451–3022 (see text for details).

Parameter Value

(units) Steady emission Dips

tbabs
NH (1022 cm-2)

edge
Eedge (keV) 8.14
τ 0.44

warmabs
(1022 cm-2)
log (ξ) (erg cm s-1)
Si
S
Ar
Ca
K 0†† 0
Cr
Mn
Fe
σv (km s-1)
v (km s-1)

Gaussian
E6 (keV) 6.20
σ6 (keV) 0 0
EW6 (keV)

Gaussian
E7 (keV) 5.71
σ7 (keV) 0 0
EW7 (keV) –0.017 ± 0.007

diskBB
kTdiskbb (keV) 1.21 ± 0.01
N diskbb

F0.5−10 keV
(Unabsorbed flux†††) (5.6) (5.3)
χ2/ν (d.o.f) 1.32 (121) 0.99 (107)

Notes. The model in Xspec is tbabs*cabs*edge*warmabs *(gaussian+gaussian+diskbb). Here, is the column density of the warm absorbing material, log (ξ) its ionization status, σv its turbulent velocity broadening, v the bulk velocity shift, and EW the equivalent width of the Gaussian lines. The abundance of each element is indicated as a fraction of the corresponding solar value.

(†)

Parameter frozen in the fit.

(††)

The fit turned out to be insensitive to sufficiently small values of this parameter and so it was fixed to zero.

(†††)

Absorbed and unabsorbed fluxes are given in units of 10-10 erg cm-2 s-1 in the 0.5–10 keV energy range estimated from Xspec by setting the tbabs and warmabs absorption column densities to zero.

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