Fig. 9
Logarithm of the ratio of C2 (top) and C3 to OH production against logarithm of the ratio of CN to OH and their error bars. Pre-perihelion values are represented with filled symbols and post-perihelion values with open symbols. The solid red line indicates the evolution of comet Lemmon between December 11 and January 13 and the dashed line between February 7 and March 4.
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