Spectral properties of the neutron star low-mass X-ray binaries 4U 1636–53, XTE J1739–285, and MAXI J1816–195

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Table 5.

Best-fitting results for the fits to the X-ray spectra of MAXI J1816–195 with reflection model M1–M4.

Model Comp	Parameter	M1	M2	M3	M4
EDGE	E (keV)	$1 . 82_{- 0.01}^{+ 0.02}$ $1.82_{-0.01}^{+0.02}$	1.83 ± 0.02	1.83 ± 0.02	1.83 ± 0.02
	τ (10⁻²)	$4 . 63_{- 0.94}^{+ 0.93}$ $4.63_{-0.94}^{+0.93}$	$4 . 14_{- 1.04}^{+ 1.05}$ $4.14_{-1.04}^{+1.05}$	$4 . 86_{- 0.98}^{+ 1.03}$ $4.86_{-0.98}^{+1.03}$	$4 . 38_{- 0.99}^{+ 1.03}$ $4.38_{-0.99}^{+1.03}$

TBABS	N_H (10²² cm⁻²)	2.60 ± 0.03	2.62 ± 0.03	$2 . 60_{- 0.02}^{+ 0.03}$ $2.60_{-0.02}^{+0.03}$	$2 . 62_{- 0.02}^{+ 0.03}$ $2.62_{-0.02}^{+0.03}$
BBODYRAD	kT_BB (keV)	1.05 ± 0.04	1.31 ± 0.05	$1 . 11_{- 0.04}^{+ 0.05}$ $1.11_{-0.04}^{+0.05}$	$1 . 35_{- 0.04}^{+ 0.05}$ $1.35_{-0.04}^{+0.05}$
	Norm	$78 . 3_{- 10.2}^{+ 12.7}$ $78.3_{-10.2}^{+12.7}$	$4 . 5_{- 1.2}^{+ 1.1}$ $4.5_{-1.2}^{+1.1}$	$62 . 4_{- 10.0}^{+ 12.2}$ $62.4_{-10.0}^{+12.2}$	5.1 ± 0.7
	Flux (10⁻¹⁰ c.g.s)	10.3 ± 0.3	1.4 ± 0.3	$10 . 1_{- 0.2}^{+ 0.3}$ $10.1_{-0.2}^{+0.3}$	1.8 ± 0.3
DISKBB	kT_disk (keV)	0.56 ± 0.01	0.52 ± 0.01	0.57 ± 0.01	0.53 ± 0.01
	Norm	$1312_{- 106}^{+ 112}$ $1312_{-106}^{+112}$	$1822_{- 168}^{+ 195}$ $1822_{-168}^{+195}$	$1180_{- 100}^{+ 120}$ $1180_{-100}^{+120}$	$1583_{- 169}^{+ 183}$ $1583_{-169}^{+183}$
	Flux (10⁻¹⁰ c.g.s)	27.0 ± 0.7	27.6 ± 0.7	$26 . 4_{- 0.5}^{+ 1.0}$ $26.4_{-0.5}^{+1.0}$	$26 . 8_{- 0.4}^{+ 0.7}$ $26.8_{-0.4}^{+0.7}$
THCOMP	Γ	2.04 ± 0.02	$2 . 02_{- 0.02}^{+ 0.03}$ $2.02_{-0.02}^{+0.03}$	$2 . 02_{- 0.02}^{+ 0.03}$ $2.02_{-0.02}^{+0.03}$	2.00 ± 0.02
	kT_e (keV)	$13 . 6_{- 0.7}^{+ 0.8}$ $13.6_{-0.7}^{+0.8}$	$13 . 3_{- 0.7}^{+ 0.8}$ $13.3_{-0.7}^{+0.8}$	$14 . 8_{- 1.0}^{+ 1.1}$ $14.8_{-1.0}^{+1.1}$	$14 . 7_{- 0.9}^{+ 0.5}$ $14.7_{-0.9}^{+0.5}$
	f_cov	$0 . 80_{- 0.03}^{+ 0.04}$ $0.80_{-0.03}^{+0.04}$	0.30 ± 0.02	$0 . 77_{- 0.03}^{+ 0.04}$ $0.77_{-0.03}^{+0.04}$	0.27 ± 0.02
RELXILLCP	Incl	$16 . 4_{- 5.8}^{+ 4.3}$ $16.4_{-5.8}^{+4.3}$	$14 . 2_{- 6.4}^{+ 4.4}$ $14.2_{-6.4}^{+4.4}$	–	–
	R_in (R_g)	$5 . 16_{- 0 }^{+ 0.23}$ $5.16_{-0}^{+0.23}$	$5 . 16_{- 0 }^{+ 0.22}$ $5.16_{-0}^{+0.22}$	–	–
	log(ξ)	$2 . 19_{- 0.07}^{+ 0.08}$ $2.19_{-0.07}^{+0.08}$	$2 . 24_{- 0.07}^{+ 0.08}$ $2.24_{-0.07}^{+0.08}$	–	–
	Norm (10⁻⁴)	$25 . 1_{- 3.2}^{+ 3.5}$ $25.1_{-3.2}^{+3.5}$	$25 . 3_{- 3.0}^{+ 3.2}$ $25.3_{-3.0}^{+3.2}$	–	–
	Flux (10⁻¹⁰ c.g.s)	$37 . 5_{- 5.1}^{+ 6.1}$ $37.5_{-5.1}^{+6.1}$	$37 . 2_{- 5.5}^{+ 5.0}$ $37.2_{-5.5}^{+5.0}$	–	–
RELXILLLPCP	Incl	–	–	$21 . 3_{- 3.5}^{+ 3.7}$ $21.3_{-3.5}^{+3.7}$	$20 . 5_{- 3.7}^{+ 2.9}$ $20.5_{-3.7}^{+2.9}$
	R_in (R_g)	–	–	$5 . 16_{- 0 }^{+ 0.16}$ $5.16_{-0}^{+0.16}$	$5 . 16_{- 0 }^{+ 0.13}$ $5.16_{-0}^{+0.13}$
	h (R_g)	–	–	$2 . 99_{- 0.22}^{+ 0.60}$ $2.99_{-0.22}^{+0.60}$	$2 . 99_{- 0.32}^{+ 0.51}$ $2.99_{-0.32}^{+0.51}$
	log(ξ)	–	–	$2 . 16_{- 0.07}^{+ 0.08}$ $2.16_{-0.07}^{+0.08}$	$2 . 20_{- 0.06}^{+ 0.08}$ $2.20_{-0.06}^{+0.08}$
	Norm(10⁻²)	–	–	$3 . 0_{- 1.5}^{+ 3.4}$ $3.0_{-1.5}^{+3.4}$	$3 . 1_{- 1.4}^{+ 2.8}$ $3.1_{-1.4}^{+2.8}$
	Flux (10⁻¹⁰ c.g.s)	–	–	$42 . 1_{- 5.1}^{+ 7.1}$ $42.1_{-5.1}^{+7.1}$	$42 . 6_{- 4.8}^{+ 5.7}$ $42.6_{-4.8}^{+5.7}$
	$χ_{ν}^{2}$ $\chi_{\nu}^{2}$ (χ²/d.o.f.)	1.06(2062.2/1945)	1.07(2077.8/1945)	1.05(2041.4/1944)	1.05(2050.3/1944)
	Total Flux (10⁻¹⁰ c.g.s)	$85 . 3_{- 4.7}^{+ 5.2}$ $85.3_{-4.7}^{+5.2}$	$85 . 2_{- 4.3}^{+ 4.8}$ $85.2_{-4.3}^{+4.8}$	$88 . 9_{- 4.1}^{+ 6.0}$ $88.9_{-4.1}^{+6.0}$	$88 . 9_{- 4.1}^{+ 4.9}$ $88.9_{-4.1}^{+4.9}$

Notes. We list the unabsorbed flux (erg cm⁻² s⁻¹) in the energy range 0.1–100 keV. The asterisk indicates that the error peaked at the hard limit of the parameter range.

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