Table 9.
Best-fit spectral parameters of the Crab nebula at energies > 50 GeV from the joint fit to the Fermi-LAT and H.E.S.S. data compared to results from MAGIC (Aleksić et al. 2015) and from the joint analysis of LAT, MAGIC, VERITAS, FACT, and H.E.S.S. (Nigro et al. 2019).
| k0 | Γ | β | |
|---|---|---|---|
| LAT (binned) + H.E.S.S. (unbinned) | 4.6 ± 0.2 | 2.43 ± 0.03 | −0.115 ± 0.016 |
| LAT (binned) + H.E.S.S. (stacked On-Off wstat) | 4.5 ± 0.2 | 2.42 ± 0.04 | −0.111 ± 0.018 |
| LAT (binned) + H.E.S.S. (unbinned, response scale) | 4.3 ± 0.5 | 2.45 ± 0.05 | −0.113 ± 0.017 |
| LAT (binned) + H.E.S.S. (stacked On-Off wstat, response scale) | 4.3 ± 0.5 | 2.43 ± 0.05 | −0.110 ± 0.018 |
| MAGIC (a) | 3.23 ± 0.03 | 2.47 ± 0.01 | −0.104 ± 0.004 |
| LAT + MAGIC + VERITAS + FACT + H.E.S.S. (b) | 3.85 ± 0.11 | 2.51 ± 0.03 | −0.104 ± 0.009 |
Notes. The spectrum is modelled using a curved power law dN/dE(E) = k0(E/E0)−Γ + βln(E/E0) with a pivot energy E0 = 1 TeV. k0 is given in units of 10−11 cm−2 s−1 TeV−1. The values of β from the literature have been scaled to take into account the different definitions of the curved power law.
Values are from Aleksić et al. (2015).
Values are from Nigro et al. (2019).
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