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Fig. 3
Top: the Ca ii H line at 3 968 Å (blended with Hε) and Ca ii K line at 3933 Å of KOI 74, which features a thin interstellar absorption. Middle: the Hα line at 6563 Å. Bottom: sky spectrum recorded with SOPHIE’s second fiber (2′ from KOI 74) in the region of the Hα line. The spectra have been rebinned by 10.
This figure is made of several images, please see below:
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