Unveiling the intensity-dependent wake structure of Vela X–1 using MAXI/GSC

Open Access

Table 2.

Best-fit parameters obtained from the time-averaged intensity and intensity-resolved spectroscopy.

				Best fit values
Component	Parameter	Units	Time-averaged intensity	Low intensity	Mid intensity	High intensity

`tBabs`	N_{H_gal}	10²² cm⁻²	0.37 ^(a)	0.37 ^(a)	0.37 ^(a)	0.37 ^(a)
`pcfabs`	N_{H_pcfabs}	10²² cm⁻²	17.02 ± 0.89	16.7 ± 1.4	16.0 ± 1.3	18.4 $_{- 1.4}^{+ 1.5}$ $_{-1.4}^{+1.5}$
	CvrFract		0.83 ± 0.01	0.83 ± 0.01	0.82 ± 0.01	0.83 ± 0.01
`CompST`	kT	keV	5.96 $_{- 0.18}^{+ 0.20}$ $_{-0.18}^{+0.20}$	5.69 $_{- 0.28}^{+ 0.34}$ $_{-0.28}^{+0.34}$	6.07 $_{- 0.28}^{+ 0.33}$ $_{-0.28}^{+0.33}$	6.08 $_{- 0.28}^{+ 0.34}$ $_{-0.28}^{+0.34}$
	τ		13.02 ± 0.38	12.83 ± 0.62	13.08 $_{- 0.56}^{+ 0.55}$ $_{-0.56}^{+0.55}$	13.31 ± 0.62
	Norm		0.27 ± 0.01	0.24 ± 0.02	0.28 ± 0.02	0.35 ± 0.03
`Gaussian`	E_line	keV	6.35 ± 0.04	6.35 ^(b)	6.35 ^(b)	6.35 ^(b)
	σ_line	keV	< 0.26	0.15 ^(b)	0.15 ^(b)	0.15 ^(b)
	Norm	10⁻³ photons cm⁻² s⁻¹	4.50 $_{- 0.43}^{+ 0.49}$ $_{-0.43}^{+0.49}$	3.62 $_{- 0.46}^{+ 0.45}$ $_{-0.46}^{+0.45}$	4.51 $_{- 0.55}^{+ 0.54}$ $_{-0.55}^{+0.54}$	6.84 $_{- 0.80}^{+ 0.78}$ $_{-0.80}^{+0.78}$
	Eq. width	eV	182 $_{- 20}^{+ 21}$ $_{-20}^{+21}$	178 $_{- 23}^{+ 27}$ $_{-23}^{+27}$	174 ± 24	201 $_{- 25}^{+ 26}$ $_{-25}^{+26}$
Flux_{2 − 20 keV}		10⁻⁹ ergs cm⁻² s⁻¹	3.50 $_{- 0.02}^{+ 0.01}$ $_{-0.02}^{+0.01}$	2.76 $_{- 0.04}^{+ 0.01}$ $_{-0.04}^{+0.01}$	3.76 $_{- 0.04}^{+ 0.02}$ $_{-0.04}^{+0.02}$	4.90 $_{- 0.06}^{+ 0.02}$ $_{-0.06}^{+0.02}$

χ²/d.o.f.			320.84/351	342.76/353	352.61/353	359.03/353

Notes.

^(a)

Frozen to the Galactic value along the line of sight.

^(b)

These values were frozen to their time-averaged values.

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