Planetary Space Weather
Open Access
Technical Article

Fig. 9


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Effective area of EUV instrument detector estimated from standard star white dwarf GD71 observation on 29 July, 2016. The dip at around 121.6 nm is due to an absence of cesium iodide photocathode, which reduced the huge number of photon counts from hydrogen Lyman alpha emission (see Yoshioka et al., 2013).

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