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Table 4

Parameters for two for the spectrum of the extended emission.

Collisionally ionized plasma model
Component Parameter Value Units ΔC a

Warm CIE T e b 0.22 ± 0.02 keV − 239
Norm 2.8 ± 0.4 1055 cm-3

Cold CIE T e b 0.020 ± 0.002 keV − 374
Norm 1055 cm-3

Photoionized plasma model
Component Parameter Value Units ΔC

Warm PION log ξ c 1.3 ± 0.1 erg cm s-1 − 224
N H d 2.1 ± 0.5 1022 cm-2

Cold PION log ξ c − 4.1 ± 0.1 erg cm s-1 − 358
N H d 1.8 ± 0.8 1022 cm-2



Decrease of the C-statistic with respect to a model including only the spectrum of the nucleus scattered by the PSF wings (C/Expected = 430/45).


Plasma electron temperature.


Ionization parameter of the photoionized gas.


Hydrogen column density of the photoionized gas.

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