S 308 and other X-ray emitting bubbles around Wolf–Rayet stars

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Table 2

Best-fit values obtained with a double VPSHOCK model.

Model	constantTBabs(vpshock + vpshock)
Instrumental background factor

Source

N_H (10²² cm⁻²)
kT (keV)
Tau_u (10¹⁰ cm⁻³ s)
Normalization
kT (keV)
C/C_⊙
N/N_⊙
Tau_u (10¹⁰ cm⁻³ s)
Normalization

Sky background factor

Statistic	873/875=1.0

Notes. The normalization factors (“factor”) of instrumental and sky background are also expressed. Normalization is expressed as , where n_e is the electron density of the plasma (cm⁻³), n_H, is the hydrogen density (cm⁻³) and D (cm) is the distance of the source.

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