Table 2
Results from spectral analysis of Vela X in full energy range >10 GeV: properties of the LE and HE components for different morphological models.
| Model A | Model B | Model C | ||
|---|---|---|---|---|
 (d.o.f.) |
0 (0) | − 13.5 (–1) | − 16.2 (–3) | |
| LE component | Energy fluxa | 2.0 ± 0.5 | 2.5 ± 0.5 | 2.6 ± 0.4 |
| Spectral index | 2.19 ± 0.16 | 2.14 ± 0.13 | 1.98 ± 0.16 | |
| TS | 74.3 | 86.0 | 100.3 | |
| HE component | Energy fluxa | 2.6 ± 0.9 | 2.5 ± 0.9 | 2.1 ± 1.2 |
| Spectral index | 0.9 ± 0.3 | 1.1 ± 0.3 | 1.2 ± 0.3 | |
| TS | 32.9 | 34.8 | 6.4 |
Notes. The models are described in Sect. 2.3. Different models are compared based on the difference of the likelihood logarithm (
), and the difference in number of degrees of freedom (d.o.f.) associated with Vela X, taking model A as reference. The detection significance of a component is given by 
, where 
and 
are the maximum likelihood values of the model including or not including the component, respectively. (a) 10−5 MeV cm−2 s−1, integrated for energies between 10 GeV and 2 TeV.
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