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Table 2

Parameters of the best-fit spectral model to the putative pulsar and nebula with background, without diffuse emission.

Region Absorption Photon index F x a F x a C-stat/Nd.o.f.
– 1021 cm-2 Γ keV keV 0.5–8 keV 2–10 keV
Pulsar 0.70 (f) – 0.20 ± 0.05 0.22 ± 0.05 (2.48 ± 1.04) × 10-15 – 248.48/442
Compact nebula 1.12 ± 0.25 – – (2.80 ± 0.24) × 10-13 (3.2 ± 0.42) × 10-13 466.50/440
Inner nebula 0.70 (f) 1.20 ± 0.16 – – (1.94 ± 0.40) × 10-13 (2.17 ± 0.32) × 10-13 434.86/440
Outer nebula 0.70 (f) – – (8.87 ± 1.3) × 10-14 (1.07 ± 0.21) × 10-13 369.53/440
West lobe 0.70 (f) 1.30 ± 0.33 – – (3.24 ± 0.72) × 10-14 (3.55 ± 1.02) × 10-14 255.71/442
East lobe 0.70 (f) 0.93 ± 0.38 – – (3.15 ± 0.78) × 10-14 (3.86 ± 1.20) × 10-14 234.26/442

Notes. Errors are quoted at 90% confidence. Absorption is fixed in all the fits, except in the case of the total nebula.

(a)

Observed flux in units of erg cm-2 s-1. (f) Parameter fixed for consistency between fit regions. Instrumental line at 1.49 ± 0.11 keV sigma fixed.

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