New JWST redshifts for the host galaxies of CDF-S XT1 and XT2: Understanding their nature

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Table 3.

Results of the 0.5−7 keV X-ray spectral fits for CDF-S XT1 and XT2.

FXT	z	N_H, Gal	N_H	Γ	logNorm	Abs. flux	Unabs. flux	C-stat. (d.o.f.)	ln𝒵
(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
CDF-S XT1	2.76	0.02	$2 . 08_{- 1.51}^{+ 2.67}$ $2.08^{+2.67}_{-1.51}$	$1 . 74_{- 0.21}^{+ 0.24}$ $1.74^{+0.24}_{-0.21}$	$- 5 . 14_{- 0.08}^{+ 0.09}$ $-5.14^{+0.09}_{-0.08}$	$4 . 77_{- 0.49}^{+ 0.34}$ $4.77_{-0.49}^{+0.34}$	$4 . 92_{- 0.46}^{+ 0.49}$ $4.92_{-0.46}^{+0.49}$	79.76 (91)	−48.002 ± 0.276
CDF-S XT2	3.4598	0.02	$6 . 43_{- 2.43}^{+ 3.46}$ $6.43^{+3.46}_{-2.43}$	1.86 ± 0.20	−5.06 ± 0.08	$3 . 84_{- 0.39}^{+ 0.42}$ $3.84_{-0.39}^{+0.42}$	$5 . 82_{- 0.51}^{+ 0.54}$ $5.82_{-0.51}^{+0.54}$	74.64 (95)	−44.460 ± 0.228

Notes. Column 1: Target. Column 2: Redshift assumed. Columns 3 and 4: Galactic and intrinsic column density absorption (×10²²) in units of cm⁻², respectively. The former is kept fixed during the fit. Column 5: Photon index from the power-law model. Column 6: Normalization parameter (in units of photons keV⁻¹ cm⁻² s⁻¹). Columns 7 and 8: Absorbed and unabsorbed 0.3−10 keV fluxes (×10⁻¹⁴) in units of erg cm⁻² s⁻¹. Column 9: C-stat. value and the number of degrees of freedom in parentheses. Column 10: Log-evidence values (ln𝒵) for each model, with 1-σ confidence errors from the posterior distributions obtained by BXA.

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