First observations of H2O and CO2 vapor in comet 67P/Churyumov-Gerasimenko made by VIRTIS onboard Rosetta

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Table 5

CO₂/H₂O column density ratio.

#	Region	⟨ N(CO₂)⟩/⟨ N(H₂O)⟩ ^a
		P1^b	P1 and P2^c

3	Anuket	0.018 ± 0.007	0.032 ± 0.019
5	Ash	0.030 ± 0.016	0.030 ± 0.011
6	Aten	0.040 ± 0.008	0.038 ± 0.012
9	Babi	0.031 ± 0.012	0.027 ± 0.012
11	Hapi	0.014 ± 0.009	–
12	Hatmehit	0.100 ± 0.035	0.068 ± 0.039
13	Imhotep	–	0.072 ± 0.033
15	Ma’at	0.040 ± 0.018	0.040 ± 0.018
18	Serqet	–	0.053 ± 0.025
19	Seth	0.032 ± 0.017	0.029 ± 0.016

Notes.

^(a)

Cubes where mean solar incidence from LOS is <50°;

^(b)

using cubes where the region is contributing in first (P1) position; error bars are standard deviations from the mean; for regions with one measurement, the error bar is the uncertainty on that measurement.

^(c)

Using cubes where the region is contributing in first (P1) and second position (P2), by its solid angle as viewed from the LOS.

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