Tentative evidence of spatially extended GeV emission from SS433/W50

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Table 2

SED fit results for different radiation models.

Radiation	Parent particle	W_e/p ^(a)	α or α₁	E_cutoff or E_break	β or α₂	MLL ^(b)
model	distribution	(×10⁴⁹ erg)		(GeV)
pp	ECPL	11.9	2.1 ± 0.2	2.7	1 (fixed)	−1.6
	ECPL	12.1	2.1	2.8	1.1 ± 0.3	−1.6
	BPL	11.4 ± 0.5	2.1 ± 0.2	2.4	4.0 ± 0.4	−1.0

IC	ECPL	2.8	1.5 ± 0.1	9.5 ± 1.2	1 (fixed)	−31.4
	ECPL	3.7 ± 0.3	1.7 ± 0.1	12	5.3 ± 0.7	−13.3
	BPL	3.4	1.6 ± 0.1	8.3	6.4	−10.3

Rel. bremsstrahlung	ECPL	1.6 ± 0.1	1.6 ± 0.2	1.0	1 (fixed)	−10.6
	ECPL	1.5 ± 0.1	1.7 ± 0.2	1.4 ± 0.3	1.8	−10.8
	BPL	1.5 ± 0.1	1.5 ± 0.3	0.7	3.7	−7.5

Notes. All errors correspond to a 1σ confidence level. ^(a) Total energy of the electrons or protons. The W_p is calculated based on theprotons >1 GeV and the W_e is calculated based on theelectrons >100 MeV. ^(b) Maximum log-likelihood (MLL).

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