Fig. 7

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Values of C60:C in the diffuse ISM as a function of LOS (see Table 3). Triangle symbols (▾ and ▿): upper limits uN(C60, γ0)/N(C
, λ) with λ = 9577.5 Å and λ = 9632.7 Å, respectively. Error bars correspond to errors given in Table 3. Gray area: C60:C
according to Berné et al. (2017). Horizontal dotted line: C60:C
for a typical diffuse medium as derived by Bakes & Tielens (1995). Horizontal dashed line: mean value of the present upper limits. Horizontal solid line: weighted mean value of the present upper limits. Vertical dotted lines separate the data relevant to each LOS.
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