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Fig. 1.

image

Rosetta data from 7 March 2015. Panel a: RPC-ICA ion energy spectrum. Panel b: RPC-IES ion energy spectrum. Panel c: RPC-IES electron energy spectrum. The spectra in panels ac are summed over all viewing directions and the colour-coded quantities ΓICA, ΓIES,i, and ΓIES,e represent the differential particle flux in units of s−1 sr−1 m−2 eV−1. Panel d: magnetic flux density in CSEQ coordinates measured by RPC-MAG: Bx (blue), By (green), and Bz (red). Panel e: magnitude |B| of the B-field. Panel e: estimate of the cosine of the angle between the solar wind electric field vector and the nucleus to spacecraft direction projected onto the yz plane. Approximate E/q values for H+, He2+, He+, and H2O+ are indicated on the right-hand side of panels a and b. The cyan ticks in each panel indicate the times referred to in the text.

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