Table 3.
Phase-averaged (PA) and phased-resolved spectra parameters for the Vela pulsar obtained with 96 months of Fermi-LAT data using the exponentially cut-off power-law hypothesis (ECPL) above 100 MeV, and a simple power law (PWL) for energies > 10 GeV.
| Model | ECPL (> 100 MeV) : Φ0(E/E0)−Γexp[−(E/Ec)b] | PWL (> 10 GeV) : Φ0(E/E0)−Γ | ||||
|---|---|---|---|---|---|---|
| Φ0 | Γ | b | Ec (MeV) | Φ0 | Γ | |
| PA | 17.64 ± 0.02 | 0.913 ± 0.003 | 0.439 ± 0.001 | 143 ± 2 | – | – |
| P1 | 4.36 ± 0.08 | 1.086 ± 0.005 | 0.468 ± 0.002 | 164 ± 4 | 3.48 ± 0.58 | 5.24 ± 0.27 |
| P2 | 8.28 ± 0.13 | 0.890 ± 0.004 | 0.385 ± 0.001 | 78 ± 2 | 40.3 ± 1.8 | 4.10 ± 0.08 |
| LW2 | 4.97 ± 0.22 | 0.916 ± 0.013 | 0.523 ± 0.007 | 385 ± 24 | 4.84 ± 0.73 | 4.17 ± 0.27 |
| P3 | 3.70 ± 0.10 | 0.71 ± 0.07 | 0.51 ± 0.03 | 254 ± 89 | 12.7 ± 1.2 | 5.05 ± 0.16 |
Notes. The flux normalization, Φ0, is given in units of 10−9 MeV−1 cm−2 s−1 at the reference energy E0 = 1 GeV for the ECPL fit, and in units of 10−9 TeV−1 cm−2 at E0 = 25 GeV for the PWL model. Phase ranges of the various features are defined in Table 1.
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