Parameters of the spectral fits of the entire SNR and results of the likelihood ratio tests for each of the models from Table 2.
|Model||Φ0 [cm-2 s-1 TeV-1]||Γ||β||Ecut [TeV]||logL||NFP||Significance|
|PL||(27.4 ± 0.9) × 10−12||2.30 ± 0.03||n/a||n/a||− 51.717||2||n/a|
|CPL||(28.8 ± 1.1) × 10−12||1.89 ± 0.07||0.23 ± 0.04||n/a||− 24.567||3||7.3σ|
|ECPL||(32.2 ± 1.5) × 10−12||1.81 ± 0.08||n/a||6.7 ± 1.2||− 21.623||3||7.7σ|
Notes. The central section of the table lists the fit parameters. In the case of the power law with exponential cutoff, Ecut is shown instead of the fitted parameter λ = 1∕Ecut. The quoted errors represent 1σ statistical uncertainties. In all cases the reference energy E0 was chosen to be 1 TeV. The right section of the table shows the results of the likelihood ratio test in order to check for the existence of a curvature in the spectrum. The logarithm of the likelihood L, the number of free parameters NFP, and the equivalent significance of the probability of the test in Gaussian standard deviations σ are shown for each fitted model. The test results apply to the comparison of a certain model with respect to the simpler (i.e., power law) model.
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