XRISM reveals a variable, multi-phase outflow-inflow structure during the 2024 X-ray obscured outburst of black hole transient V4641 Sgr

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Table 3.

Best-fit parameters of the photoionized plasma model.

Model	Parameter [unit]	Value
`TBabs`	N_H [10²¹ cm⁻²]	1.21 ± 0.09
`pion`	log(ξ/[erg cm s⁻¹])	3.9 ± 0.1
	N_H [10²² cm⁻²]	$50_{- 30}^{+ 70}$ $Mathematical equation: $ 50^{+70}_{-30} $$
	v_rms [km s⁻¹]	$220_{- 50}^{+ 60}$ $Mathematical equation: $ 220^{+60}_{-50} $$
	z_raw	( − 4 ± 2)×10⁻⁴
	z_real^(a)	( − 8 ± 2)×10⁻⁴
	norm^(b)	$1 . 0_{- 0.4}^{+ 0.7} \times 10^{- 10}$ $Mathematical equation: $ 1.0^{+0.7}_{-0.4}\times 10^{-10} $$
`diskbb`	kT_in [keV]	1.80 ± 0.04
	norm	0.13 ± 0.01
	R_in^(c) [km]	0.40 ± 0.01
`constant`	C_xtd^(d)	1.0 (fix)
	C_rsl^(d)	1.04 ± 0.03

Fit statistic	C-stat/d.o.f.	4279/4778

Notes.

^(a)

Before and after applying the velocity correction of −117 ± 13 km s⁻¹ derived for the observation (see Appendix A for details).

^(b)

=(L_irr/4πD²)×Ω/4π.

^(c)

Calculated from diskbb normalization assuming a distance of 6.2 kpc and an inclination of 72° (MacDonald et al. 2014).

^(d)

Cross-normalization factors of Xtend and Resolve.

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