Application of hydrostatic local thermodynamic equilibrium atmosphere models to interpretations of supersoft X-ray source spectra

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Table 2

Parameters of the investigated SSSs.

Parameter	CAL 83⁽^a⁾	CAL 83⁽^a⁾	CAL 83⁽^a⁾	CAL 83^(b)	CAL 83^(a)(bb)	RX J0513^(a)	RX J0513^(c)	RX J0513^(a)(bb)
N_H, 10²⁰ cm⁻²	6.5^(d)	5.5^(d)	$5.13 \pm_{0.12}^{0.11}$ $\[5.13 \pm_{0.12}^{0.11}\]$	6.5 ± 1.0	5.13^(d)	$5.40 \pm_{0.10}^{0.09}$ $\[5.40 \pm_{0.10}^{0.09}\]$	$5.94 \pm_{0.4}^{0.47}$ $\[5.94 \pm_{0.4}^{0.47}\]$	5.4^(d)
T_eff, kK	533 ± 2	556 ± 1	560 ± 2	550 ± 25	$540 \pm_{2}^{3}$ $\[540 \pm_2^3\]$	$629 \pm_{4}^{6}$ $\[629 \pm_4^6\]$	$594 \pm_{7}^{10}$ $\[594 \pm{ }_7^{10}\]$	684 ± 4
M/M_⊙	1.39 ± 0.01	$1.39 \pm_{0.02}^{0.01}$ $\[1.39 \pm_{0.02}^{0.01}\]$	$1.29 \pm_{0.07}^{0.06}$ $\[1.29 \pm_{0.07}^{0.06}\]$	1.3 ± 0.3		$1.33 \pm_{0.07}^{0.05}$ $\[1.33 \pm_{0.07}^{0.05}\]$	1.0 ± 0.2
R⁽^e⁾, 10⁸ cm	7.8 ± 0.1	6.3 ± 0.1	6.0 ± 0.1	7.0 ± 0.7	8.6 ± 0.2	7.0 ± 0.2	10±2	6.5 ± 0.1
L^(e), 10³⁷ erg s⁻¹	3.5 ± 0.1	2.7 ± 0.1	2.5 ± 0.1	3.5 ± 1.2	4.4 ± 0.2	5.4 ± 0.4	7.5 ± 2	6.5 ± 0.3
log g	8.48 ± 0.02	8.66 ± 0.01	8.67 ± 0.03	8.5 ± 0.1		$8.56 \pm_{0.04}^{0.03}$ $\[8.56 \pm_{0.04}^{0.03}\]$	$8.4 \pm_{0.15}^{0.04}$ $\[8.4 \pm_{0.15}^{0.04}\]$
Δ log g	0.75 ± 0.02	0.86 ± 0.01	0.86 ± 0.03	≈0.7		$0.55 \pm_{0.04}^{0.03}$ $\[0.55 \pm_{0.04}^{0.03}\]$	$0.49 \pm_{0.15}^{0.04}$ $\[0.49 \pm_{0.15}^{0.04}\]$
`cstat` (d.o.f.)^(f)	7005.47	6823.29	6811.52		6438.81	2114.14		2175.42
	(3807)	(3807)	(3806)		(3808)	(575)		(577)

Notes. ^(a)Parameters obtained in this work; ^(b)parameters obtained by Lanz et al. (2005), ^(c)parameters obtained by Ibragimov et al. (2003); Suleimanov & Ibragimov (2003); ^(d)hydrogen column density N_H is fixed; ^(e)the distance to the LMC is assumed to be 50 kpc (Pietrzyński et al. 2019); ^(f)C-statistics and the number of degrees of freedom for the best fit found using Bayesian analysis.

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