Fig. 2
G/R intensity ratio as a function of the heliocentric distance (au). Results for 12 other comets obtained from the UVES spectrograph and analyzed by Decock et al. (2013) are also plotted for comparison. The solid line represents the average value for the R1 Lovejoy spectra, and the corresponding standard deviation (σ) range is denoted with horizontal dashed lines.
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