Disk reflection and energetics from the accreting millisecond pulsar SRGA J144459.2−604207

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Table 1.

Best-fit parameters of SRGA J1444 data from XMM-Newton (RGS and PN) +NuSTAR observations of the persistent emission fit jointly.

Model	Parameter	Value
`tbabs`	N_H [10²² cm⁻²]	$1 . 92_{- 0.01}^{+ 0.03}$ $1.92^{+0.03}_{-0.01}$
`bbodyrad`	temp [keV]	$0 . 64_{- 0.01}^{+ 0.02}$ $0.64^{+0.02}_{-0.01}$
	Radius [norm]	$179_{- 64}^{+ 103}$ $179^{+103}_{-64}$
`diskbb`	Temp [keV]	$0 . 44_{- 0.06}^{+ 0.09}$ $0.44^{+0.09}_{-0.06}$
	Radius [norm]	$664_{- 292}^{+ 451}$ $664^{+451}_{-292}$
nthComp	Γ	$2 . 39_{- 0.04}^{+ 0.01}$ $2.39^{+0.01}_{-0.04}$
	kT_e [keV]	$18 . 2_{- 2.7}^{+ 0.7}$ $18.2^{+0.7}_{-2.7}$
	kT_seed [keV]	$0 . 93_{- 0.02}^{+ 0.02}$ $0.93^{+0.02}_{-0.02}$
	norm	$0 . 039_{- 0.001}^{+ 0.002}$ $0.039^{+0.002}_{-0.001}$
Reflection	Betor	$- 2 . 49_{- 0.09}^{+ 0.08}$ $-2.49^{+0.08}_{-0.09}$
	R_in [R_g]	6.0^+1.6
	R_out [R_g]	1000 (fix)
	Inclinat. [deg]	$52 . 7_{- 1.6}^{+ 1.9}$ $52.7^{+1.9}_{-1.6}$
	Refl. frac.	$- 0 . 73_{- 0.10}^{+ 0.17}$ $-0.73^{+0.17}_{-0.10}$
	Iron abund.	$0 . 16_{- 0.01}^{+ 0.01}$ $0.16^{+0.01}_{-0.01}$
	log ξ	$2 . 31_{- 0.03}^{+ 0.05}$ $2.31^{+0.05}_{-0.03}$
Edges
Ne 0.87 keV	Energy [keV]	$0 . 84_{- 0.01}^{+ 0.01}$ $0.84^{+0.01}_{-0.01}$
	τ	$0 . 69_{- 0.04}^{+ 0.07}$ $0.69^{+0.07}_{-0.04}$
Mg 1.31 keV	Energy [keV]	$1 . 32_{- 0.01}^{+ 0.01}$ $1.32^{+0.01}_{-0.01}$
	τ	$0 . 082_{- 0.01}^{+ 0.01}$ $0.082^{+0.01}_{-0.01}$
Fe XXVI? (Zn 9.65) keV	Energy [keV]^**	$9 . 68_{- 0.13}^{+ 0.13}$ $9.68^{+0.13}_{-0.13}$
	τ	$0 . 014_{- 0.003}^{+ 0.002}$ $0.014^{+0.002}_{-0.003}$
Gaussian emission lines
Si K-edge (1.8 keV)	Energy [keV]	$1 . 83_{- 0.01}^{+ 0.01}$ $1.83^{+0.01}_{-0.01}$
	σ [keV]	$0 . 14_{- 0.01}^{+ 0.01}$ $0.14^{+0.01}_{-0.01}$
	norm [10⁻³]	$5 . 36_{- 0.8}^{+ 0.9}$ $5.36^{+0.9}_{-0.8}$
Au M-edge (2.2 keV)	Energy [keV]	$2 . 24_{- 0.01}^{+ 0.01}$ $2.24^{+0.01}_{-0.01}$
	σ [keV]	$0 . 067_{- 0.01}^{+ 0.02}$ $0.067^{+0.02}_{-0.01}$
	norm [10⁻³]	$1 . 87_{- 0.2}^{+ 0.3}$ $1.87^{+0.3}_{-0.2}$
Ar XVIII (3.32 keV)	Energy [keV]	$3 . 29_{- 0.15}^{+ 0.11}$ $3.29^{+0.11}_{-0.15}$
	σ [keV]	$0 . 40_{- 0.07}^{+ 0.06}$ $0.40^{+0.06}_{-0.07}$
	norm [10⁻³]	$5 . 0_{- 1.3}^{+ 2.2}$ $5.0^{+2.2}_{-1.3}$
	Flux^†	$3 . 225_{- 0.005}^{+ 0.005}$ $3.225^{+0.005}_{-0.005}$
	χ²/d.o.f.	881/719

Notes. All errors are reported at 1σ c.l. The model is constant*tbabs (bbodyrad + diskbb + nthComp + gau_Si+ gau_Au+ rdblur^** gau_Ar + rdblur*rfxconv*nthComp)*edge*edge *edge. ^*Parameters for this rdblur component are linked to the ones obtained from the reflection component (see text). ^**For this parameter, we also calculated errors at 90% c.l., resulting in $9 . 68_{- 0.22}^{+ 0.23}$ $9.68^{+0.23}_{-0.22}\,$ keV (see text). ^†Unabsorbed flux calculated in the 0.01–100 keV band and reported in units of 10⁻⁹ erg cm⁻² s⁻¹.

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