Revealing the state transition of Cen X-3 at high spectral resolution with Chandra

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Table 4.

Best-fit model parameters for each of the different four segments.

Spectra	χ_r²	$N_{H}^{LOC}$ $N_{\mathrm{H}}^{\mathrm{LOC}}$	C	$N_{H}^{ISM}$ $N_{\mathrm{H}}^{\mathrm{ISM}}$	K_bb	kT_bb	$F_{bb}^{unabs}$ $F^{\mathrm{unabs}}_{\mathrm{bb}}$	R_W
		(×10²² cm⁻²)		(×10²² cm⁻²)	(×10⁻³)	(keV)	(×10⁻¹⁰ ergs cm⁻² s⁻¹)	(km)
Segment 1-a	1.6	56 $_{- 4}^{+ 5}$ $^{+5}_{-4}$	1.000 ± 0.014	1.300 ± 0.008	6.5 ± 0.3	2.10 ± 0.04	6.9 ± 0.3	2.700 ± 0.003
Segment 1-b	1.2	48 $_{- 4}^{+ 5}$ $^{+5}_{-4}$	1.00 ± 0.04	1.30 ± 0.03	14.0 $_{- 0.4}^{+ 0.5}$ $^{+0.5}_{-0.4}$	1.60 ± 0.02	22.0 ± 0.2	8.700 $_{- 0.009}^{+ 0.008}$ $^{+0.008}_{-0.009}$
Segment 2	1.6	75.0 $_{- 1.9}^{+ 2.0}$ $^{+2.0}_{-1.9}$	1.000 ± 0.003	1.300 ± 0.001	27.00 ± 0.18	1.200 ± 0.005	43.00 ± 0.04	20.00 ± 0.02
Segment 3	1.0	55 $_{- 6}^{+ 7}$ $^{+7}_{-6}$	0.85 $_{- 0.11}^{+ 0.12}$ $^{+0.12}_{-0.11}$	1.300 ± 0.015	18.00 ± 0.08	1.50 ± 0.03	23.00 ± 0.03	9.600 $_{- 0.010}^{+ 0.009}$ $^{+0.009}_{-0.010}$

Notes. See Fig. 3 for segment division and Fig. 8 for the evolution of the different model parameters through the observation. The best-fit model parameters obtained for each interval are collected in Table A.1.

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