X-ray spectro-polarimetry analysis of the weakly magnetized neutron star X-ray binary GX 9+1

Open Access

Table 3.

Spectral fitting (Part 2): Cross-calibration constants, IXPE gain shift, NICER absorption edges, unabsorbed photon fluxes, and flux ratios.

Parameter	Value
C_FPMB-FPMA	$0 . 981_{- 0.001}^{+ 0.001}$ $0.981^{+0.001}_{-0.001}$
C_XTI-FPMA	$0 . 940_{- 0.004}^{+ 0.004}$ $0.940^{+0.004}_{-0.004}$
C_DU1-FPMA	$0 . 808_{- 0.003}^{+ 0.003}$ $0.808^{+0.003}_{-0.003}$
C_DU2-FPMA	$0 . 809_{- 0.003}^{+ 0.003}$ $0.809^{+0.003}_{-0.003}$
C_DU3-FPMA	$0 . 790_{- 0.003}^{+ 0.003}$ $0.790^{+0.003}_{-0.003}$

α_DU1	$1 . 017_{- 0.004}^{+ 0.004}$ $1.017^{+0.004}_{-0.004}$
β_DU1 (eV)	$- 42_{- 16}^{+ 15}$ $-42^{+15}_{-16}$
α_DU2	$1 . 008_{- 0.005}^{+ 0.004}$ $1.008^{+0.004}_{-0.005}$
β_DU2 (eV)	$- 24_{- 18}^{+ 15}$ $-24^{+15}_{-18}$
α_DU3	$1 . 016_{- 0.004}^{+ 0.004}$ $1.016^{+0.004}_{-0.004}$
β_DU3 (eV)	$- 24_{- 15}^{+ 16}$ $-24^{+16}_{-15}$

E₁ (keV)	1.52 $_{- 0.05}^{+ 0.03}$ $^{+0.03}_{-0.05}$
d₁	0.16 $_{- 0.02}^{+ 0.02}$ $^{+0.02}_{-0.02}$
E₂ (keV)	1.85 $_{- 0.02}^{+ 0.02}$ $^{+0.02}_{-0.02}$
d₂	0.17 $_{- 0.02}^{+ 0.02}$ $^{+0.02}_{-0.02}$
E₃ (keV)	2.38 $_{- 0.03}^{+ 0.03}$ $^{+0.03}_{-0.03}$
d₃	0.11 $_{- 0.02}^{+ 0.01}$ $^{+0.01}_{-0.02}$

Fluxes
F_{E range (keV)}	(erg s⁻¹ cm⁻²)

F_2–8	1.27 × 10⁻⁸
F_2–3	3.10 × 10⁻⁹
F_3–8	9.60 × 10⁻⁹
F_3–30	1.38 × 10⁻⁸
F_bol	2.36 × 10⁻⁸

F_diskbb/F_2–8	41.34 %
F_{(thcomp*bbodyrad)}/F_2–8	57.09 %
F_relxillNS/F_2–8	1.61 %

F_diskbb/F_2–3	69.78 %

Notes.E, is the energy of the absorption edge; d is the absorption depth at the threshold. The flux values are given with an error within 1%. Values are reported at 90% CL.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.