The population of hyper-luminous X-ray sources as seen by XMM-Newton

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Table 2.

Best-fit values of XMM-Newton spectra of ESO 243-49 HLX-1 used in this work.

ObsID.	N_H	T_disc	Γ	HR	Unabs. L_X	χ²/d.o.f.b	n.h.p.	State
	(10²⁰ cm⁻²)	(keV)			(10⁴¹ erg s⁻¹)
0204540201	$15_{- 10}^{+ 14}$ $15_{-10}^{+14}$	$0 . 09_{- 0.02}^{+ 0.12}$ $0.09_{-0.02}^{+0.12}$	3.4 ± 0.6	0.080 ± 0.006	7.3 ± 0.4	45.81/41	0.279	High/soft
0560180901	1.52a	0.134 ± 0.003	$2 . 53_{- 0.19}^{+ 0.18}$ $2.53_{-0.19}^{+0.18}$	0.160 ± 0.004	3.82 ± 0.06	144.62/150	0.609	High/soft
0655510201	1.52a	0.20 ± 0.02	$0 . 9_{- 0.8}^{+ 0.7}$ $0.9_{-0.8}^{+0.7}$	1.48 ± 0.18	0.225 ± 0.019	79.74/60	0.045	Low/hard
0693060401	1.52a	$0 . 127_{- 0.014}^{+ 0.013}$ $0.127_{-0.014}^{+0.013}$	2.08 ± 0.19	0.66 ± 0.03	0.91 ± 0.03	86.61/82	0.343	Interm.
0693060301	1.52a	$0 . 16_{- 0.03}^{+ 0.04}$ $0.16_{-0.03}^{+0.04}$	$2 . 0_{- 0.3}^{+ 0.2}$ $2.0_{-0.3}^{+0.2}$	0.83 ± 0.06	0.284 ± 0.015	110.39/109	0.445	Low/hard
0801310101	3.1 ± 1.3	0.142 ± 0.004	2.9 ± 0.16	0.1393 ± 0.0017	5.36 ± 0.05	334.74/281	0.015	High/soft

Notes. The HR is the ratio of the unabsorbed fluxes in the energy bands 1.5–10 keV and 0.3–1.5 keV. Unabsorbed luminosities are computed in the 0.3–10 keV band. aParameter frozen to the Galactic absorption (HI4PI Collaboration 2016). bd.o.f. = degrees of freedom.

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