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Table 4

Simultaneous fitting results of combined, spin-phase resolved X-ray spectra of RX J0720.43125 using a condensed iron surface and hydrogen atmosphere model.

Fit Groups*

parameter** I II III IV V Remark

nH × 1020 [cm-2] 1.20 ± 0.06 1.17 ± 0.06 1.17 ± 0.06 1.18 ± 0.06 1.18 ± 0.06 free
kTp1 [eV] 104.0 ± 4.3 110.2 ± 4.1 108.3 ± 4.5 107.5 ± 4.0 106.6 ± 3.6 free
kTp2 [eV] 102.5 ± 4.2 107.7 ± 3.9 109.5 ± 4.8 105.8 ± 3.8 105.6 ± 3.4 free
Bp12 × 1013 [G] 3.00 ± 0.15 ibid ibid ibid ibid linked
θ [°] 88.9 ± 4.8 ibid ibid ibid ibid linked
i [°] 42.8 ± 2.2 ibid ibid ibid ibid linked
z 0.205 ± 0.001 ibid ibid ibid ibid linked
σline [ev] 268.3 ± 50.9 313.4 ± 38.6 329.0 ± 56.9 302.7 ± 60.3 310.6 ± 60.4 free
τline 0.80 ± 0.24 1.56 ± 0.26 1.38 ± 0.26 1.37 ± 0.26 1.18 ± 0.22 free

Reduced χ2 χ2/ d.o.f. = 6070/4910 = 1.24
C-statistic 6050 using 5050 PHA bins and 4910 d.o.f.

Notes.

(*)

See Sect. 3.2, Table 1, Fig. 1, and Fig. A.1 for definition of the data groups and parameters.

(**)

Parameter uncertainty corresponds to the 95% of the HPD interval.

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