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Home All issues Volume 691 (November 2024) A&A, 691 (2024) A264 Full HTML
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Table 2.

Spectral parameters obtained from fitting the average spectra of J0826 using model B = ‘tbabs×(partcov×tbabs)×(gsmooth× ∑ i = 1 4 vapec i $ \sum_{i=1}^4 {\mathtt{vapec}}_{i} $ + gauss)’.

Model Parameters Without BAT With BAT
tbabs NH ( 10 20 cm − 2 $ 10^{20} \rm ~cm^{-2} $) 1 . 4 − 0.4 + 0.4 $ 1.4_{-0.4}^{+0.4} $ 1 . 7 − 0.4 + 0.5 $ 1.7_{-0.4}^{+0.5} $
partcov cf 0 . 30 − 0.03 + 0.03 $ 0.30_{-0.03}^{+0.03} $ 0 . 27 − 0.03 + 0.03 $ 0.27_{-0.03}^{+0.03} $
tbabs NH, cf ( 10 22 cm − 2 $ 10^{22} \rm ~cm^{-2} $) 1 . 5 − 0.2 + 0.3 $ 1.5_{-0.2}^{+0.3} $ 1 . 6 − 0.3 + 0.4 $ 1.6_{-0.3}^{+0.4} $
gsmooth σ6 keV (eV) 7 . 4 − 2.0 + 2.0 $ 7.4_{-2.0}^{+2.0} $ 7 . 8 − 2.2 + 2.2 $ 7.8_{-2.2}^{+2.2} $
vapec T1 (keV) 0 . 125 − 0.006 + 0.007 $ 0.125_{-0.006}^{+0.007} $ 0 . 122 − 0.006 + 0.007 $ 0.122_{-0.006}^{+0.007} $
ZN (Z⊙) 23 . 4 − 4.4 + 5.2 $ 23.4_{-4.4}^{+5.2} $ 25 . 8 − 5.0 + 6.1 $ 25.8_{-5.0}^{+6.1} $
ZO (Z⊙) 7 . 8 − 1.2 + 1.4 $ 7.8_{-1.2}^{+1.4} $ 8 . 1 − 1.3 + 1.5 $ 8.1_{-1.3}^{+1.5} $
ZNe (Z⊙) 10 . 8 − 2.3 + 2.1 $ 10.8_{-2.3}^{+2.1} $ 11 . 1 − 2.4 + 2.3 $ 11.1_{-2.4}^{+2.3} $
ZMg (Z⊙) 5 . 6 − 1.2 + 1.2 $ 5.6_{-1.2}^{+1.2} $ 5 . 9 − 1.2 + 1.3 $ 5.9_{-1.2}^{+1.3} $
ZSi (Z⊙) 6 . 9 − 1.2 + 1.4 $ 6.9_{-1.2}^{+1.4} $ 7 . 2 − 1.3 + 1.5 $ 7.2_{-1.3}^{+1.5} $
ZS (Z⊙) 2 . 7 − 1.0 + 1.2 $ 2.7_{-1.0}^{+1.2} $ 2 . 7 − 1.1 + 1.2 $ 2.7_{-1.1}^{+1.2} $
ZFe (Z⊙) 3 . 2 − 0.3 + 0.4 $ 3.2_{-0.3}^{+0.4} $ 3 . 2 − 0.3 + 0.4 $ 3.2_{-0.3}^{+0.4} $
N1 (10−4) 1 . 4 − 0.3 + 0.4 $ 1.4_{-0.3}^{+0.4} $ 1 . 4 − 0.3 + 0.4 $ 1.4_{-0.3}^{+0.4} $
vapec T2 (keV) 0 . 90 − 0.03 + 0.04 $ 0.90_{-0.03}^{+0.04} $ 0 . 90 − 0.03 + 0.05 $ 0.90_{-0.03}^{+0.05} $
N2 (10−4) 1 . 5 − 0.2 + 0.3 $ 1.5_{-0.2}^{+0.3} $ 1 . 4 − 0.2 + 0.3 $ 1.4_{-0.2}^{+0.3} $
vapec T3 (keV) 4 . 7 − 0.3 + 0.3 $ 4.7_{-0.3}^{+0.3} $ 4 . 7 − 0.3 + 0.3 $ 4.7_{-0.3}^{+0.3} $
N3 (10−3) 3 . 0 − 0.4 + 0.4 $ 3.0_{-0.4}^{+0.4} $ 2 . 9 − 0.4 + 0.4 $ 2.9_{-0.4}^{+0.4} $
vapec T4 (keV) 43 . 2 − 4.9 + 6.0 $ 43.2_{-4.9}^{+6.0} $ 42 . 6 − 5.3 + 5.7 $ 42.6_{-5.3}^{+5.7} $
N4 (10−2) 1 . 31 − 0.05 + 0.05 $ 1.31_{-0.05}^{+0.05} $ 1 . 27 − 0.06 + 0.05 $ 1.27_{-0.06}^{+0.05} $
gauss F6.4 (10−5) 3 . 3 − 0.3 + 0.3 $ 3.3_{-0.3}^{+0.3} $ 3 . 3 − 0.3 + 0.3 $ 3.3_{-0.3}^{+0.3} $
EW6.4 (eV) 85 . 3 − 8.1 + 8.6 $ 85.3_{-8.1}^{+8.6} $ 86 . 8 − 3.4 + 3.4 $ 86.8_{-3.4}^{+3.4} $
Unabsorbed X-ray flux FX, unabs (10−11 erg cm−2 s−1) 4 . 23 − 0.01 + 0.01 $ 4.23_{-0.01}^{+0.01} $ —
Absorbed X-ray flux FX, abs (10−11 erg cm−2 s−1) 3 . 856 − 0.009 + 0.009 $ 3.856_{-0.009}^{+0.009} $ —
Bolometric flux FX, bol (10−10 erg cm−2 s−1) 1 . 092 − 0.003 + 0.003 $ 1.092_{-0.003}^{+0.003} $ 1 . 081 − 0.003 + 0.003 $ 1.081_{-0.003}^{+0.003} $
Bolometric luminosity LX, bol (1033 erg s−1) 1 . 759 − 0.004 + 0.004 $ 1.759_{-0.004}^{+0.004} $ 1 . 739 − 0.004 + 0.004 $ 1.739_{-0.004}^{+0.004} $
χν2 (dof) 1.36 (1237) 1.23 (1237)

Notes. σ6 keV is the line width of Gaussian lines at 6 keV. The abundances of the other three vapec components were tied to the first component. FX, unabs and FX, abs are unabsorbed and absorbed X-ray flux in the 0.3–10.0 keV energy band, respectively. FX, bol is the unabsorbed bolometric flux derived for the 0.001–100.0 keV energy band and LX, bol is the corresponding bolometric luminosity calculated by assuming a distance of 366 pc.

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