Table 3

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.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.