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Fig. 4

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Results of the fitting of the C3 (crosses, lower curves) and C2 (diamonds, upper curves) column density profiles of the comets in our data set, using the reaction network by H05. The results for the sunward and tailward side of the nucleus are presented separately. For comet 9P/Tempel 1, the solid lines are the results obtained with the water production rate according to Küppers et al. (2005), the dashed lines according to Mumma et al. (2005).

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