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Table B.1.

Parameter constraints derived from fitting the spectrum at each epoch with one or two black bodies.

Model Parameter X1 X2 X3 S1 C1
constant CMOS 0.9 ± 0.1 0.94 ± 0.05 1.04 ± 0.06 - -
TBabs NH (1020 cm−2) [2.6] [2.6] [2.6] [2.6] [2.6]
zbbody1 kTe (keV) 0.116 ± 0.004 0.13 ± 0.01 0.13 ± 0.01 0.14 ± 0.04 0.07 ± 0.02
Normzbb1 (1037(1 + z)−2erg/s/kpc2) (1.51 ± 0.09)×10−6 (2.3 ± 0.2)×10−6 (2.0 ± 0.1)×10−6 (2 ± 1)×10−7 10 − 6 + 22 × 10 − 7 $ 10_{-6}^{+22}\times10^{-7} $
zbbody2 kTe (keV) - 0 . 28 − 0.05 + 0.10 $ 0.28^{+0.10}_{-0.05} $ 0 . 34 − 0.09 + 0.19 $ 0.34_{-0.09}^{+0.19} $ - -
Normzbb2 (1037(1 + z)−2erg/s/kpc2) - ( 3 − 2 + 3 ) × 10 − 7 $ (3_{-2}^{+3})\times10^{-7} $ ( 1 . 1 − 0.3 + 0.7 ) × 10 − 7 $ (1.1_{-0.3}^{+0.7})\times10^{-7} $ - -
C-stat/d.o.f. 10.4/18 41.3/46 46.0/46 1.8/6 4.3/4

Notes. The fit function is "constant*TBabs*(zbbody1+zbbody2)". Values held fixed during the fit are given in between square brackets. Parameter CMOS is the renormalisation factor between the EPIC MOS and EPIC pn on–board XMM-Newton. Statistically, only X2 and X3 require the second, hotter black body to achieve a good fit, and therefore the fit function used to fit the other epochs do not include a second black body.

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