Multi-instrument analysis of far-ultraviolet aurora in the southern hemisphere of comet 67P/Churyumov-Gerasimenko

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Table 4

Properties of the four intervals on 4 Aug. 2016 at 3.5 au.

Period	Start time [UTC]	End time [UTC]	CO₂ column density⁽¹⁾ [10¹⁴ cm⁻²]	H₂O column density⁽²⁾ [10¹⁴ cm⁻²]	CO column density⁽³⁾ [10¹⁴ cm⁻²]	Ave. electron flux for 20-60 eV [10⁷ cm⁻² s⁻¹ eV⁻¹]
1 - Peaks	01:38:59	05:42:30	6.21 ± 0.16	0.5 ± 0.03	<1.1	15.5-44.9
1 - Troughs						0.56-10.1
2	07:25:24	10:59:15	2.65 ± 0.17	2.24 ± 0.09	–	0.77-23.3
3	11:51:51	15:56:18	8.43 ± 0.14	0.36 ± 0.02	<1.3	3.16-20.4
4	17:38:16	21:12:03	7.93 ± 0.23	0.31 ± 0.02	–	3.48-7.95

Notes. The first period has been split into the peaks and troughs in the electron flux, which can be seen in Fig. 7. These are the same periods as shown in Fig. 8 in dark blue (peaks) and light blue (troughs). ⁽¹⁾ From VIRTIS-H. ⁽²⁾ From MIRO. ⁽³⁾ 3σ upper limitsfrom MIRO.

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