HESS J1809−193: A halo of escaped electrons around a pulsar wind nebula?

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Table 3.

Best-fit parameter values for the Fermi-LAT data analysis.

Par. [unit]	Value
J1810.3−1925e

RA [deg]	272.547 ± 0.033_stat
	()
Dec. [deg]	−19.397 ± 0.038_stat

σ [deg]	0.317 ± 0.024_stat
N₀ [10⁻⁹ GeV⁻¹ cm⁻² s⁻¹]	2.86 ± 0.27_stat ± 0.09_sys
α	2.53 ± 0.11_stat
β	−0.015 ± 0.043_stat
E₀ [GeV]	1.747 (fixed)

J1811.5−1925

RA [deg]	272.874 ± 0.025_stat
	()
Dec. [deg]	−19.410 ± 0.027_stat

N₀ [10⁻⁹ GeV⁻¹ cm⁻² s⁻¹]	0.016 ± 0.003_stat ± 0.001_sys
Γ	2.42 ± 0.16_stat
E₀ [GeV]	7.48 (fixed)

Notes. σ is the 1-σ radius of the Gaussian spatial model. N₀, α, β, Γ, and E₀ are parameters of the spectral models defined in Eqs. (3) and (1).

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