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Table 3.

Best-fit parameters of the spectral models applied to the joint data from NICER, NuSTAR, and IXPE.

Model Parameter (units) Model A Model B
TBabs NH (1022 cm−2) 8 . 58 0.08 + 0.09 $ 8.58_{-0.08}^{+0.09} $ 8 . 70 0.05 + 0.03 $ 8.70_{-0.05}^{+0.03} $

diskbb kTin (keV) 0.87 ± 0.06 1 . 36 0.02 + 0.04 $ 1.36_{-0.02}^{+0.04} $
norm ([Rin/D10]2cosθ) 670 110 + 280 $ 670_{-110}^{+280} $ 166 15 + 7 $ 166_{-15}^{+7} $

comptt T0 (keV) 1.19 ± 0.03 1 . 90 0.07 + 0.06 $ 1.90_{-0.07}^{+0.06} $
kT (keV) 3 . 5 0.10 + 0.06 $ 3.5_{-0.10}^{+0.06} $ 3 . 3652 0.0011 + 0.0004 $ 3.3652_{-0.0011}^{+0.0004} $
τ 4 . 8 0.05 + 0.17 $ 4.8_{-0.05}^{+0.17} $ 3 . 7 0.2 + 0.9 $ 3.7_{-0.2}^{+0.9} $
norm 0.70 ± 0.02 0 . 278 0.006 + 0.040 $ 0.278_{-0.006}^{+0.040} $

Gaussian E (keV) 6 . 65 0.06 + 0.05 $ 6.65_{-0.06}^{+0.05} $
σ (keV) 0 . 50 0.10 + 0.06 $ 0.50_{-0.10}^{+0.06} $
norm (photon cm−2 s−1) 0.0043 ± 0.0005
Equivalent width (eV) 38 ± 8

relxillNS Emissivity [3.0]
Rin (ISCO) [1.44]
Rout (GM/c2) [1000]
Inclination (deg) 36 . 7 1.4 + 2.9 $ 36.7_{-1.4}^{+2.9} $
logξ 2 . 72 0.14 + 0.10 $ 2.72_{-0.14}^{+0.10} $
AFe 0 . 70 0.19 + 0.33 $ 0.70_{-0.19}^{+0.33} $
logN [19]
norm 0 . 0032 0.0006 + 0.0010 $ 0.0032_{-0.0006}^{+0.0010} $

χ2/d.o.f. 1470/1394 = 1.05 1535/1406 = 1.09

Cross normalization factors
CNICER 1.0 1.0
CNuSTAR − A 1.15 ± 0.02 1.031 ± 0.004
CNuSTAR − B 1.24 ± 0.02 1 . 110 0.010 + 0.002 $ 1.110_{-0.010}^{+0.002} $
CIXPE − DU1 0.749 ± 0.015 0.699 ± 0.003
CIXPE − DU2 0.760 ± 0.015 0.708 ± 0.003
CIXPE − DU3 0.749 ± 0.015 0 . 697 0.004 + 0.002 $ 0.697_{-0.004}^{+0.002} $

Photon flux ratios in 2–8 keV
Fdiskbb/Ftot 0.210 0.540
Fcomptt/Ftot 0.784 0.337
Fgauss, relxillNS/Ftot 0.006 0.123

Notes. The estimated flux in 2–8 keV is 5 × 10−9 erg s−1 cm−2. The errors are reported at 90% CL.

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