Fig. 4.
Observation statistics of the HARPS spectra used in this work (∼212 000 spectra). The panels show the distribution of the exposure times (left), the achieved S/N at 550 nm for the obtained spectra (middle), and a scatter plot of the exposure times vs. the S/N (right). The red dashed lines mark the range of S/N adopted in this work to create a template spectrum.
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