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Fig. 7
The observed spectrum – fitted continuum of W3. No emissions above the 3σ-levels were detected, when the comet was at heliocentric distances greater than 6.25 au from the Sun (Panels A) and B)). Emissions are identified in the spectra, when the comet was at a heliocentric distance of 3.74 au (Panels C) and D)).
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