Fig. 2

image

Energy spectrograms summed over all viewing directions and integrated over one hour for a) solar wind ions and b) water group ions [m-2 s-1 eV-1]. Panel c) shows the distance to the comet (red line, right y axis, in km) and the heliocentric distance (black line, left y axis, in AU). The blue vertical lines indicate the start of each month in the dataset. The x axis shows accumulated hours of measurements since 1 August 2014. Note that the timescale is not linear since data gaps were removed. In panel a), the white transparent boxes indicate where O6+ (m/q = 2.7) ions were detected by RPC-ICA. They appear as a weak signal around 1.5 keV, between two stronger signals (He2+ and He+).

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