Unveiling extended gamma-ray emission around HESS J1813-178

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Table 3

Best-fit parameters for the morphology of HESS J1813–178B in different energy bands, for both Fermi-LAT (F1 – F6) and H.E.S.S. datasets (H1 large – H3 large).

	Energy [GeV]	RA [º]	Dec [º]	σ_M[º]	e
F1	1.0–2.0	273.46 ± 0.02	−17.67 ± 0.02	0.39 ± 0.04	0.81 ± 0.05
F2	2.0–4.0	273.48 ± 0.03	−17.69 ± 0.03	0.42 ± 0.04	0.85 ± 0.04
F3	4.0–7.5	273.38 ± 0.04	−17.66 ± 0.06	0.39 ± 0.08	0.87 ± 0.07
F4	7.5–18	273.26 ± 0.09	−17.52 ± 0.12	0.53 ± 0.11	0.75 ± 0.19
F5	18–58	273.17 ± 0.10	−17.77 ± 0.08	0.57 ± 0.16	0.77 ± 0.21
F6	58–1.0 × 10³	273.22 ± 0.20	−17.75 ± 0.13	0.71 ± 0.19	0.92 ± 0.08

H1 small	(0.4–1.3) × 10³	273.393 ± 0.005	−17.832 ± 0.005	0.054 ± 0.004	–
H2 small	(1.3–5.7) × 10³	273.397 ± 0.006	−17.834 ± 0.007	0.064 ± 0.005	–
H3 small	(5.7–100) × 10³	273.4O8 ± 0.009	−17.817 ± 0.009	0.035 ± 0.006	–

H1 large	(0.4–1.3) × 10³	273.61 ± 0.08	−17.48 ± 0.09	0.87 ± 0.12	0.88 ± 0.04
H2 large	(1.3–5.7) × 10³	273.41 ± 0.09	−17.42 ± 0.11	0.48 ± 0.09	0.48 ± 0.38
H3 large	(5.7–100) × 10³	273.65 ± 0.11	−17.18 ± 0.10	0.41 ± 0.09	0.00 ± 0.02

Notes. An elongated Gaussian model was assumed in all cases and the 1σ statistical uncertainties are given. Additionally, the best-fit values for the symmetrical Gaussian were used to account for the emission from HESS J1813–178A.

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